Leonardo Notarbartolo strolls into the prison visiting room trailing a guard as if the guy were his personal assistant. The other convicts in this eastern Belgian prison turn to look. Notarbartolo nods and smiles faintly, the laugh lines crinkling around his blue eyes. Though he's an inmate and wears the requisite white prisoner jacket, Notarbartolo radiates a sunny Italian charm. A silver Rolex peeks out from under his cuff, and a vertical strip of white soul patch drops down from his lower lip like an exclamation mark. In February 2003, Notarbartolo was arrested for heading a ring of Italian thieves. They were accused of breaking into a vault two floors beneath the Antwerp Diamond Center and making off with at least $100 million worth of loose diamonds, gold, jewelry, and other spoils. The vault was thought to be impenetrable. It was protected by 10 layers of security, including infrared heat detectors, Doppler radar, a magnetic field, a seismic sensor, and a lock with 100 million possible combinations. The robbery was called the heist of the century, and even now the police can't explain exactly how it was done. The loot was never found, but based on circumstantial evidence, Notarbartolo was sentenced to 10 years. He has always denied having anything to do with the crime and has refused to discuss his case with journalists, preferring to remain silent for the past six years. Until now. Notarbartolo sits down across from me at one of the visiting room's two dozen small rectangular tables. He has an intimidating reputation. The Italian anti-Mafia police contend he is tied to the Sicilian mob, that his cousin was tapped to be the next capo dei capi—the head of the entire organization. Notarbartolo intends to set the record straight. He puts his hands on the table. He has had six years to think about what he is about to say. "I may be a thief and a liar," he says in beguiling Italian-accented French. "But I am going to tell you a true story."

It was February 16, 2003 — a clear, frozen Sunday evening in Belgium. Notarbartolo took the E19 motorway out of Antwerp. In the passenger seat, a man known as Speedy fidgeted nervously, damp with sweat. Notarbartolo punched it, and his rented Peugeot 307 sped south toward Brussels. They hadn't slept in two days. Speedy scanned the traffic behind them in the side-view mirror and maintained a tense silence. Notarbartolo had worked with him for 30 years—they were childhood buddies—but he knew that his friend had a habit of coming apart at the end of a job. The others on the team hadn't wanted Speedy in on this one—they said he was a liability. Notarbartolo could see their point, but out of loyalty, he defended his friend. Speedy could handle it, he said. And he had. They had executed the plan perfectly: no alarms, no police, no problems. The heist wouldn't be discovered until guards checked the vault on Monday morning. The rest of the team was already driving back to Italy with the gems. They'd rendezvous outside Milan to divvy it all up. There was no reason to worry. Notarbartolo and Speedy just had to burn the incriminating evidence sitting in a garbage bag in the backseat. They were accused of breaking into the Antwerp Diamond Center’s supersecure vault and stealing $100 million in diamonds, gold and jewelry. The loot was never found, but their trash was. Notarbartolo pulled off the highway and turned onto a dirt road that led into a dense thicket. The spot wasn't visible from the highway, though the headlights of passing cars fractured through the trees. Notarbartolo told Speedy to stay put and got out to scout the area. He passed a rusty, dilapidated gate that looked like it hadn't been touched since the Second World War. It was hard to see in the dark, but the spot seemed abandoned. He decided to burn the stuff near a shed beside a small pond and headed back to the car. When he got there, he couldn't believe what he was seeing. Speedy had lost it. The contents of the garbage bag was strewn amongst the trees. Speedy was stomping through the mud, hurling paper into the underbrush. Spools of videotape clung to the branches like streamers on a Christmas tree. Israeli and Indian currency skittered past a half-eaten salami sandwich. The mud around the car was flecked with dozens of tiny, glittering diamonds. It would take hours to gather everything up and burn it. "I think someone's coming," Speedy said, looking panicked. Notarbartolo glared at him. The forest was quiet except for the occasional sound of a car or truck on the highway. It was even possible to hear the faint gurgling of a small stream. Speedy was breathing fast and shallow—the man was clearly in the midst of a full-blown panic attack. "Get back in the car," Notarbartolo ordered. They were leaving. Nobody would ever find the stuff here. The job was done. Location along the E19 motorway north of Brussels where Speedy dumped the garbage bag of evidence.

Patrick Peys and Agim De Bruycker arrived at the Diamond Center the next morning. They had just received a frantic call: The vault had been compromised. The subterranean chamber was supposed to be one of the most secure safes in the world. Now the foot-thick steel door was ajar, and more than 100 of the 189 safe-deposit boxes had been busted open. Peys and De Bruycker were stunned. The floor was strewn with wads of cash and velvet-lined boxes. Peys stepped on a diamond-encrusted bracelet. It appeared that the thieves had so much loot, they simply couldn't carry it all away. Peys and De Bruycker lead the Diamond Squad, the world's only specialized diamond police. Their beat: the labyrinthine Antwerp Diamond District. Eighty percent of the world's rough diamonds pass through this three-square-block area, which is under 24-hour police surveillance and monitored by 63 video cameras. About $3 billion worth of gem sales were reported here in 2003, but that's not counting a hidden world of handshake deals and off-ledger transactions. Business relationships follow the ancient family and religious traditions of the district's dominant Jewish and Indian dealers, known as diamantaires. In 2000, the Belgian government realized it would require a special type of cop to keep an eye on things and formed the squad. Peys and De Bruycker were the first hires. De Bruycker called headquarters, asking for a nationwide alert: The Antwerp Diamond Center had been brazenly robbed. Then he dialed Securilink, the vault's alarm company. "What is the status of the alarm?" he asked. "Fully functional," the operator said, checking the signals coming in from the Diamond Center. "The vault is secure." "Then how is it that the door is wide open and I'm standing inside the vault?" De Bruycker demanded, glancing at the devastation all around him. He hung up and looked at Peys. They were up against a rare breed of criminal. The Diamond Center's vault after the robbery.

About 18 months earlier, in the summer of 2001, Leonardo Notarbartolo sipped an espresso at a café on Hoveniersstraat, the diamond district's main street. It was a cramped, narrow place with a half-dozen small tables, but from the corner by the window Notarbartolo could look out on the epicenter of the world's diamond trade. During business hours, Hasidic men wearing broad-brimmed hats hurried past with satchels locked to their wrists. Armored cars idled tensely while burly couriers with handguns wheeled away small black suitcases. There were Africans in bright blue suits, Indian merchants wearing loupes around their necks, and bald Armenians with reading glasses pushed up on their mottled heads. Billions of dollars in diamonds pass by the café's window. During the day, they travel from office to office in briefcases, coat pockets, and off-the-shelf rollies. At night, all those gems are locked up in safes and underground vaults. It's one of the densest concentrations of wealth in the world. It's also a thief's paradise. In 2000, Notarbartolo rented a small office in the Diamond Center, one of the area's largest buildings. He presented himself as a gem importer based in Turin, Italy, and scheduled meetings with numerous dealers. He bought small stones, paid cash, dressed well, and cheerfully mangled the French language. The dealers probably never knew that they had just welcomed one of the world's best jewel thieves into their circle. By his own account, Notarbartolo had pulled off dozens of major robberies by 2000. It wasn't just about the money anymore. He stole because he was born to be a thief. He still remembers every detail of his first robbery. It was 1958—he was 6. His mother had sent him out for milk, and he came back with 5,000 lira—about $8. The milkman had been asleep, and young Leo rifled through his drawers. His mother beat him, but it didn't matter. He had found his calling. In elementary school, he filched money from his teachers. As a teenager, he stole cars and learned to pick locks. In his twenties, he devoted himself to the study of people, tracking jewelry salesmen around Italy for weeks just to understand their habits. In his thirties, he began to assemble teams of thieves, each with their own specialty. He knew lock-picking experts, alarm aces, safecrackers, guys who could tunnel under anything, and a man who could scale the sleek exteriors of office buildings. Each job brought a different mix of thieves into play. Most, including Notarbartolo, lived in or near Turin, and the group came to be known as the School of Turin. Notarbartolo's specialty was charm. Acting the part of the jolly jeweler, he was invited into offices, workshops, and even vault rooms to inspect merchandise. He would buy a few stones and then, a week or a month later, steal the target's entire stock in the middle of the night. Antwerp provided a wealth of opportunity and a good place to fence hot property. A diamond necklace stolen in Italy could be dismantled and its individual gems sold for cash in Antwerp. He came to town about twice a month, stayed a few days at a small apartment near the Diamond District, then drove home to his wife and kids in the foothills of the Alps. When he had stolen goods to sell, he dealt with only a few trusted buyers. Now, as he finished his espresso, one of them—a Jewish dealer—came in and sat down to chat. "Actually, I want to talk to you about something a little unusual," the dealer said casually. "Maybe we could walk a little?" They headed out, and once they were clear of the district, the dealer picked up the conversation. His tone had changed however. The casualness was gone. "I'd like to hire you for a robbery," he said. "A big robbery."

The agreement was straightforward. For an initial payment of 100,000 euros, Notarbartolo would answer a simple question: Could the vault in the Antwerp Diamond Center be robbed? He was pretty sure the answer was no. He was a tenant in the building and rented a safe-deposit box in the vault to secure his own stash. He viewed it as the safest place to keep valuables in Antwerp. But for 100,000 euros, he was happy to photograph the place and show the dealer how daunting it really was. So he strolled into the Diamond District with a pen poking out of his breast pocket. At a glance, it looked like a simple highlighter, but the cap contained a miniaturized digital camera capable of storing 100 high-resolution images. Photography is strictly limited in the district, but nobody noticed Notarbartolo's pencam. He began his reconnaissance at the police surveillance booth on the Schupstraat, a street leading into the center of the district. Behind the booth's bulletproof glass, two officers monitored the area. The three main blocks of the district bristled with video cameras: Every inch of street and sky appeared to be under watch. The booth also contained the controls for the retractable steel cylinders that are deployed to prevent vehicular access to the district. As Notarbartolo walked past, he began taking pictures. He headed toward the Diamond Center itself, a gray, 14-story, fortresslike building on the south end of the district. It had a private security force that operated a nerve center located at the entrance. Access was blocked by metal turnstiles, and visitors were questioned by guards. Notarbartolo flashed his tenant ID card and breezed through. His camera captured crisp images of everything. The 3-ton steel vault door. He took the elevator, descending two floors underground to a small, claustrophobic room—the vault antechamber. A 3-ton steel vault door dominated the far wall. It alone had six layers of security. There was a combination wheel with numbers from 0 to 99. To enter, four numbers had to be dialed, and the digits could be seen only through a small lens on the top of the wheel. There were 100 million possible combinations. Power tools wouldn't do the trick. The door was rated to withstand 12 hours of nonstop drilling. Of course, the first vibrations of a drill bit would set off the embedded seismic alarm anyway. The door was monitored by a pair of abutting metal plates, one on the door itself and one on the wall just to the right. When armed, the plates formed a magnetic field. If the door were opened, the field would break, triggering an alarm. To disarm the field, a code had to be typed into a nearby keypad. Finally, the lock required an almost-impossible-to-duplicate foot-long key. During business hours, the door was actually left open, leaving only a steel grate to prevent access. But Notarbartolo had no intention of muscling his way in when people were around and then shooting his way out. Any break-in would have to be done at night, after the guards had locked down the vault, emptied the building, and shuttered the entrances with steel roll-gates. During those quiet midnight hours, nobody patrolled the interior—the guards trusted their technological defenses. Notarbartolo pressed a buzzer on the steel grate. A guard upstairs glanced at the videofeed, recognized Notarbartolo, and remotely unlocked the steel grate. Notarbartolo stepped inside the vault. It was silent—he was surrounded by thick concrete walls. The place was outfitted with motion, heat, and light detectors. A security camera transmitted his movements to the guard station, and the feed was recorded on videotape. The safe-deposit boxes themselves were made of steel and copper and required a key and combination to open. Each box had 17,576 possible combinations. Notarbartolo went through the motions of opening and closing his box and then walked out. The vault was one of the hardest targets he'd ever seen.

Notarbartolo leans toward me in the Belgian prison and asks if I have any questions so far. It is a rare break in his fast-moving monologue. There is a sense of urgency. He is allotted only one hour of visiting time per day. "You're telling me that the heist was organized by an Antwerp diamond dealer," I say. "Bravo," he replies, smiling. "What about your cousin?" His smile disappears. Notarbartolo was born in Palermo, Sicily, and members of his extended family have long been dogged by accusations of Mafia connections. Those accusations reached a crescendo last year when anti-Mafia police arrested Notarbartolo's cousin Benedetto Capizzi, claiming he was about to become the new leader of the Sicilian Mafia. Notarbartolo says the Italian authorities traveled to Belgium soon after the heist to question him about Capizzi's possible role in the robbery. If there is an organized-crime link, Notarbartolo might be inventing a story about the Jewish diamond dealer to distract attention from what really happened. Notarbartolo scoffs at this idea and insists that his cousin had nothing to do with the heist. The reality, Notarbartolo says, is that he thought the vault was impregnable. He didn't believe it could be robbed until the dealer went to extraordinary lengths to prove him wrong. The Target The Antwerp Diamond Center vault was protected by 10 layers of security. The Door

1. Combination dial (0-99)

2. Keyed lock

3. Seismic sensor (built-in)

4. Locked steel grate

5. Magnetic sensor

6. External security camera The Vault

7. Keypad for disarming sensors

8. Light sensor

9. Internal security camera

10. Heat/motion sensor (approximate location) Illustration: Joe McKendry

It took five months for the diamond dealer to call back after Notarbartolo told him the heist was impossible. He had even given him the photographs to prove it. Notarbartolo thought that would be the end of it, but now the dealer wanted to meet at an address outside Antwerp. When Notarbartolo arrived, the dealer was waiting for him in front of an abandoned warehouse. "I want to introduce you to some people," he said, unlocking the battered front door. Inside, a massive structure was covered with black plastic tarps. The dealer pulled back a corner and they ducked underneath. At first, Notarbartolo was confused. He seemed to be standing in the vault antechamber. To his left, he saw the vault door. He was inside an exact replica of the Diamond Center's vault level. Everything was the same. As far as Notarbartolo could tell, the dealer had reconstructed it based on the photographs he had provided. Notarbartolo felt like he had stepped into a movie. Inside the fake vault, three Italians were having a quiet conversation. They stopped talking when they saw the dealer and Notarbartolo. The dealer introduced them, though Notarbartolo refuses to reveal their names, referring to them only by nicknames. The Genius specialized in alarm systems. According to the dealer, he could disable any kind of alarm. "You can disable this?" Notarbartolo asked, pointing at the replica vault. "I can disable most of it," the Genius said with a smile. "You're going to have to do one or two things yourself, though." The tall, muscular man was the Monster. He was called that because he was monstrously good at everything he did. He was an expert lock picker, electrician, mechanic, and driver and had enormous physical strength. Everybody was a little scared of him, which was another reason for the nickname. The King of Keys was a quiet older man. His age set him apart from the others—he looked like somebody's grandfather. The diamond dealer said that the wizened locksmith was among the best key forgers in the world. One of his contributions would be to duplicate the nearly impossible-to-duplicate foot-long vault key. "Just get me a clear video of it," the man told Notarbartolo. "I'll do the rest." "That's not so easy," Notarbartolo pointed out. The King of Keys shrugged. That wasn't his problem. "Don't worry," the Genius said. "I'll help."

In September 2002, a guard stepped up to the vault door and began to spin the combination wheel. It was 7 am. He was right on schedule. Directly above his head and invisible behind the glare of a recessed light, a fingertip-sized video camera captured his every move. With each spin, the combination came to rest on a number. A small antenna broadcast the image. Nearby, in a storage room beside the vault, an ordinary-looking red fire extinguisher was strapped to the wall. The extinguisher was fully functional, but a watertight compartment inside housed electronics that picked up and recorded the video signal. When the guard finished dialing the combination, he inserted the vault's key. The video camera recorded a sharp image of it before it disappeared inside the keyhole. He spun the handle, and the vault door swung open.

Thursday morning, February 13, 2003. Two days before the heist. The thud-thud-thud of a police helicopter beat over a convoy of police cars escorting an armored truck through the heart of Antwerp. They blew past posters of Venus Williams—she was due in town to compete in the Proximus Diamond Games tennis tournament. The escorts bristled with firepower. They belonged to a special diamond-delivery protection unit, and each cop carried a fully automatic weapon. Their cargo: De Beers' monthly shipment of diamonds, worth millions. De Beers is the world's largest diamond-mining company. In 2003, it controlled 55 percent of the global diamond supply and operated mines in South Africa, Namibia, and Botswana, among others. The rough, unpolished gems were flown to London, where they were divided and placed in 120 boxes—one for each official De Beers distributor, many of which were headquartered in Antwerp. Every month, Antwerp's share of the boxes was flown into Belgium and transferred to a Brinks armored truck. Once the truck's doors slammed shut, the convoy sped away, sirens wailing. The vehicles rocketed past the guard gate at the entrance of the district, and the giant metal cylinders rose out of the ground behind them, blocking any further automotive access. The armed escorts fanned out on foot around the armored truck to form a perimeter. No one was allowed near the vehicle. The doors swung open, and the boxes were quickly carried through an unremarkable entrance in the middle of the block. It was payday. The Diamond District was flush.

Notarbartolo was buzzed into the vault the next day, Friday, February 14—the day before the robbery. He was alone. In his jacket pocket, he carried a can of women's hair spray. Notarbartolo used women's hair spray to temporarily disable the vault's combined heat/motion sensor. A security camera recorded his movements—police would later watch the footage—but the guard had gotten used to the Italian's frequent visits and wasn't paying attention. Notarbartolo stepped away from the safe-deposit boxes and pulled out the aerosol can. With a quick, practiced circular movement, he covered the combined heat/motion sensor with a thin coat of transparent, oily mist. The vault was momentarily filled with the smell of a woman's hair. It was a simple but effective hack: The oily film would temporarily insulate the sensor from fluctuations in the room's temperature, and the alarm went off only if it sensed both heat and motion. Still, it was hard to guess how long the trick would work. Once the Monster was in the vault, he had to install the sensor bypass before his body heat penetrated the film. He might have five minutes—he might have less. Nobody knew for sure.

Venus Williams smashed the ball crosscourt with a yelp, overwhelming her leggy Slovakian opponent. It was Saturday night, and Williams was dominating the semifinals of the Diamond Games, an event that hyped Antwerp's predominant position in the gem world. Many of the city's diamantaires watched as Williams beat down the Slovak and moved one step closer to winning a tennis racket encrusted with nearly $1 million worth of stones. Across town, the Diamond District was deserted. Notarbartolo drove his rented gray Peugeot 307 past the city's soot-covered central train station and turned onto Pelikaanstraat, a road that skirted the district. He pulled to the curb, and the Monster, the Genius, the King of Keys, and Speedy stepped out carrying large duffel bags. The King of Keys picked the lock on a run-down office building, and they disappeared through the door. It was a little past midnight. The Genius led them out the rear of the building into a private garden that abutted the back of the Diamond Center. It was one of the few places in the district that wasn't under video surveillance. Using a ladder he had previously hidden there, the Genius climbed up to a small terrace on the second floor. A heat-sensing infrared detector monitored the terrace, but he approached it slowly from behind a large, homemade polyester shield. The low thermal conductivity of the polyester blocked his body heat from reaching the sensor. He placed the shield directly in front of the detector, preventing it from sensing anything. The balcony was now safe. While the rest of the team scrambled up, the Genius disabled an alarm sensor on one of the balcony's windows. One by one, the thieves climbed through the window, dropped into a stairwell, and descended to the darkened vault antechamber. They covered the security cameras with black plastic bags and flipped on the lights. The vault door stood imposingly before them. The building was quiet—no alarms had been triggered. The police never determined how the men had entered the building. The Genius pulled a custom-made slab of rigid aluminum out of his bag and affixed heavy-duty double-sided tape to one side. He stuck it on the two plates that regulated the magnetic field on the right side of the vault door and unscrewed their bolts. The magnetic plates were now loose, but the sticky aluminum held them together, allowing the Genius to pivot them out of the way and tape them to the antechamber wall. The plates were still side by side and active—the magnetic field never wavered—but they no longer monitored the door. Some 30 hours later, the authorities would marvel at the ingenuity. The Genius used this custom-made slab of aluminum to reposition the magnetic field away from the vault door. Next, the King of Keys played out a hunch. In Notarbartolo's videos, the guard usually visited a utility room just before opening the vault. When the thieves searched the room, they found a major security lapse: The original vault key was hanging inside. The King of Keys grabbed the original. There was no point in letting the safe manufacturers know that their precious key could be copied, and the police still don't know that a duplicate was made. The King of Keys slotted the original in the keyhole and waited while the Genius dialed in the combination they had gleaned from the video. A moment later, the Genius nodded. The Monster turned off the lights—they didn't want to trigger the light detector in the vault when the door opened. In the darkness, the King of Keys turned the key and spun a four-pronged handle. The bolts that secured the door retracted and it swung heavily open. Speedy ran up the stairwell. It was his job to stay in touch with Notarbartolo, but there was no cell phone reception down in the vault. Upstairs, he got a signal and dialed his old friend. "We're in," he said and hung up. Notarbartolo put his phone back on the dashboard. He was sitting in the Peugeot and could see the front of the Diamond Center a block and a half away. His police scanner was quiet. He took a sip of cold coffee and waited. In the antechamber, the King of Keys deftly picked the lock on the metal grate. He shuffled backward as the Monster propped the grate open with two cans of paint he found in the storeroom. Like the rest of the team, the Monster wore plastic gloves—the police would find no prints on the cans. It was now up to him to disable the remaining systems. The Monster oriented himself in the darkness at the vault entrance. The only sound was the steady breathing of the others behind him. His body was already projecting heat into the vault—the hair spray on the infrared sensor wouldn't last. Every second he was there would raise the ambient temperature. He had to move quickly but keep his heart rate low. The Monster bypassed the vault security system's main inbound and outbound wires and then covered this light sensor with tape, rendering it useless. As he'd practiced in the warehouse, he strode exactly 11 steps into the middle of the room, reached for the ceiling, and pushed back a panel. He felt the security system's main inbound and outbound wires. An automatic electric pulse constantly shot into the room and back out along these wires. If any of the sensors were tripped, the circuit would break. When a pulse shot into the room, it expected an answer. If it didn't get one, it activated the alarm. With his hands over his head, the Monster used a tool to strip the plastic coating off the wires. It was a delicate task. One slip could cut through, instantly breaking the circuit and tripping the alarm. The police would later discover stripped wires in the ceiling and guess that the thieves considered cutting them, only to lose their nerve. But Notabartolo says that the Monster knew exactly what he was doing. Once the copper wires were exposed, he clipped a new, precut piece of wire between the inbound and outbound cables. This bridge rerouted the incoming electric pulse over to the outbound wire before the signal reached the sensors. It no longer mattered what happened further down the line. The sensors were out of the loop. It was now safe for the others to enter. Still, the men were cautious. They blinded the heat/motion detector with a Styrofoam box, covered the light detector with tape, and then set to work. The King of Keys unloaded a homemade, hand-cranked drill and fitted it with a thin shaft of metal. He jammed the shaft into one of the locks and cranked for about three minutes—until the lock broke, snapping open the box. The guys took turns yanking the contents out. Since they had memorized the layout of the vault in the replica, they worked in the dark, turning on their flashlights only for split seconds—enough to position the drill over the next box. But in those muffled flashes, they could glimpse their duffel bags overflowing with gold bars, millions in Israeli, Swiss, American, European, and British currencies, and leather satchels that contained the mother lode: rough and polished diamonds. They resisted the urge to examine their haul; they were running out of time. By 5:30 am, they had opened 109 boxes. A tamped-down giddiness pervaded the dark vault, but they had to stop. The streets would fill with people soon, and they needed to transfer their bags into Notarbartolo's car. Speedy relayed the message to him. They were coming out. It took almost an hour for the team to haul the bags up the stairs, pass by the infrared sensor, lower the loot down the ladder, and gather in the hallway of the decrepit office building. Notarbartolo idled at the curb while on the phone with Speedy. A bus came and went, and then the street was empty. "Now," he hissed. In the predawn half-light, the four men raced out of the building. They jammed the bags in the car, slammed the doors, and headed off on foot for Notarbartolo's apartment. He put the car in gear and slowly pulled away. In half an hour, they were huddled around the bags in the apartment. The Monster unzipped one and pulled out a leather satchel. It was time to celebrate. He opened the satchel and looked up, bewildered. It was empty. He took out another. It was also empty. A wave of anxiety swept the room. They unzipped all the other duffel bags and rifled through the satchels. More often than not, there was nothing in them. Something had gone wrong. The diamonds should have been there. "We've been set up," Notarbartolo said.

Notarbartolo stepped into a scalding-hot shower while the others made salami sandwiches in the kitchen. He needed some clarity—the fatigue was weighing on him. In the weeks preceding the heist, he had seen many of the satchels in the offices of the diamantaires, and they were always filled with inventory. He expected the total take to exceed $100 million. Now they were looking at a fraction of that—probably about $20 million. Notarbartolo reflected on his interactions with the diamond dealer, and a thought flashed through his mind: Maybe the dealer wasn't operating alone. If he tipped off a group of his fellow merchants, they could have pulled their inventory out of the vault before the heist. Each could then claim that their gems were stolen and collect the insurance while secretly keeping their stones. Most had safes in their offices—they could have simply kept the stock there. Notarbartolo realized that the heist he had spent so much time planning might have actually been part of an elaborate insurance scam. He shut off the water. A half hour earlier he was a king. Now he felt like a pawn.

Speedy and Notarbartolo were on the E19 heading out of Antwerp. It was 6 o'clock on Sunday evening. Notarbartolo settled in for the 10-hour drive back to Turin. The garbage bag filled with incriminating evidence sat in the backseat. Notarbartolo planned to stop in France and burn it, leaving no trace of the crime. But Speedy was having trouble. His face was ashen, and his eyes darted madly at the cars around them. Finally, after only 20 minutes on the road, he snapped. "I can't do the drive," he said. The guy was melting down. Notarbartolo told him to take it easy. He'd drop him at the train station in Brussels if that's what he wanted. It might actually be nicer to do the trip without his friend driving him crazy. "We can't take the garbage into Brussels," Speedy stammered. The city was crawling with cops—maybe they would be looking for them. They couldn't run the risk. They had to drop the bag immediately. "Pull off up here," he said abruptly from the passenger seat. "This is a ridiculous time to be having a panic attack," Notarbartolo muttered. "Just pull off," his friend snapped. Notarbartolo took the exit and surveyed the darkened surroundings. "There's a dirt road," Speedy said, peering into a forest. "It'll be perfect."

August Van Camp likes weasels. The 59-year-old retired Belgian grocer had two—he called them Mickey and Minnie—and he enjoyed sending them down holes in the forest. Typically, a rabbit came rocketing out the other end. It was a lot of fun. In 1998, he bought a narrow strip of forest alongside the E19 motorway. It was about a five-minute drive from his house, and if you ignored the sound of cars hurtling past at 80 miles an hour, it was a pretty 12 acres of trees with a gurgling stream. There were also a lot of holes with rabbits in them. But because it adjoined the highway, Van Camp found a lot of garbage. The local teenagers once decided to have a party there and burned down a little hut he'd built. It made him fume with anger. When he found garbage, he phoned the police, who had gotten used to his calls. A typical conversation: "The kids have made a mess on my land again." "I am sorry to hear that, Mr. Van Camp." "I demand that you send someone to investigate." "We will pass along your request." Van Camp rarely heard back. The garbage Van Camp found on his property that led to Notarbartolo's arrest. While hunting one morning—Monday, February 17, to be exact—Van Camp was incensed to find yet another pile of junk in the underbrush. After a flash of pique that made him puff out his cheeks, throw up his arms, and wonder what the world was coming to, he knelt down and glared at the refuse. He wanted to be able to describe to the cops what he had to put up with. There was videotape strewn all over the place. A wine bottle rested near a half-eaten salami sandwich. There were also some white envelopes printed with the words diamond center, antwerp. Van Camp's irritation increased. "Kids," he grumbled. At home, he punched in the number for the police and asked to lodge a complaint. The officer listened as Van Camp tallied the mess. When Van Camp mentioned Diamond Center envelopes, the officer broke in. "What was that?" he said. "Antwerp Diamond Center envelopes," Van Camp sputtered. This time, the police came running.

By mid-afternoon, a half-dozen detectives swarmed the forest, painstakingly gathering the garbage and collecting stray gems. Van Camp watched with satisfaction. The police were finally treating his litter situation with the proper respect. Within hours, the trash began to fill the evidence room at the Diamond Squad headquarters in Antwerp. A member of the squad bent over the clear plastic bags, looking for immediate clues. A pile of torn paper seemed promising. It didn't take long to reassemble the pieces like a jigsaw puzzle. It was an invoice for a low-light video surveillance system. The buyer: Leonardo Notarbartolo. Notarbartolo's invoice for a low-light video surveillance system. Back at Van Camp's property, another detective knelt among the thorny brambles and peered at a small, jagged piece of paper poking out of the mud. He carefully lifted it free and held it up to the light. It was a business card that bore the address and phone number of Elio D'Onorio, an Italian electronics expert tied to a series of robberies. Notarbartolo has consistently refused to identify his accomplices, but all evidence indicates that D'Onorio is the Genius. The lab techs also bagged a half-eaten salami sandwich. They found Antipasto Italiano salami packaging nearby and sent it along to Diamond Squad headquarters. Four days later, the detectives executed a search warrant on the apartment Notarbartolo rented in Antwerp. In a cupboard, they found a receipt from a local grocery store for Antipasto Italiano salami. The receipt had a time-stamp. A detective drove to the grocery and asked the manager to rewind his closed-circuit television to 12:56 pm on Thursday, February 13. When the video came to a halt and snapped into focus, there was an image of a tall, muscular Italian purchasing salami. His name: Ferdinando Finotto—the man most likely to be the Monster.

On Monday—about 36 hours after the job was completed—the team of thieves reassembled at a bar in Adro, Italy, a small town about 50 miles northeast of Milan. They had agreed to meet the diamond dealer there and divide the loot. The dealer would get a third for financing the operation and putting the team together. The others would split the rest. They had anticipated a haul in the tens of millions each. Now they were looking at roughly $3 million per man. It was still a lot of money, but they couldn't help feeling they'd been played. Everybody had a lot of questions for the dealer. Hour after hour, he didn't arrive. Notarbartolo was already uneasy about what had happened in the forest. He knew he had made a mistake—he should have turned around after he dropped off Speedy at the train station and gone back to burn the garbage. It was an embarrassing oversight, but what really irked him was that he had vouched for his friend, and the guy had cracked. They waited at the bar until closing, drinking espressos and then beer. The dealer never showed.

On Thursday night, Notarbartolo ate dinner with his family at home outside of Turin. He tried to pretend that everything was normal. As usual, his 3-year-old granddaughter played with his cell phone and made him laugh. He momentarily forgot his worries. His biggest problem was that he needed to go back to Belgium; the rental car was due in Antwerp the next day. The plan had always been to return it and show his face at the Diamond Center. That way, if the cops were looking for tenants who'd disappeared, he wouldn't be on the list. It would also give him an opportunity to clean his apartment more thoroughly. He told his family that he'd be leaving early the next morning. His wife decided to come along; she hadn't seen much of him lately. They could even have a nice dinner party with some friends from the Netherlands. The next morning, as the Notarbartolos blew through the Swiss Alps, the police surrounded their home in Italy. Acting on the surveillance-system invoice discovered on Van Camp's land, the Belgian diamond detectives had asked the Italian police to search Notarbartolo's house. His 24-year-old son, Marco, was there and refused to open the front door. He frantically dialed his father's cell phone while the police smashed the door open. In Notarbartolo's jacket pocket, his phone flashed but made no sound. His granddaughter had accidently turned off the ringer the night before. Marco called his mother's phone—it was turned off. He tried his dad's phone repeatedly. It just rang and rang. Unaware, Notarbartolo sped toward Antwerp. Leonardo Notarbartolo was part of a five-man team behind the heist of the century. Photo Courtesy Leonardo Notarbartolo

As Notarbartolo drove back to Belgium, Peys and De Bruycker wondered whether they'd ever catch the thieves. They could be anywhere by now: Brazil, Thailand, Russia. It never occurred to the detectives that one of the robbers would walk right back into the district. But that's exactly what Notarbartolo did. While one of his friends from the Netherlands waited on the street outside the Diamond Center, Notarbartolo waved at the security guard and dropped in to collect his mail. The guard knew that the police were investigating Notarbartolo and phoned the building manager, who immediately called the detectives. When the police arrived, they found Notarbartolo chatting with the building manager and began peppering him with questions. The friend took off as Notarbartolo stalled for time, pretending to have trouble understanding French and claiming that he couldn't remember the exact address of his own apartment. He just knew how to walk there. "Let's go then," Peys said and loaded the Italian into a car. Eventually, Notarbartolo pointed out the apartment. As the police car pulled to the curb, Notarbartolo's wife and the friends who'd come for dinner stepped out of the building. They were loaded down with bags and one carried a rolled-up carpet. Another minute and they would have been gone. The police took everyone into custody.

The bags contained critical evidence. The police dug out a series of prepaid SIM cards that were linked to cell phones used almost exclusively to call three Italians: Elio D'Onorio, aka the Genius; Ferdinando Finotto, alias the Monster; and the person most likely to be Speedy, an anxious, paranoid man named Pietro Tavano, a longtime associate of Notarbartolo's. On the night of the heist, a cell tower in the Diamond District logged the presence of all three, plus Notarbartolo. During that time, Tavano stayed in constant contact with Notarbartolo. The day Notarbartolo was arrested, Italian police broke open the safe at his home in Turin. They found 17 polished diamonds attached to certificates that the Belgian diamond detectives traced back to the vault. More gems were vacuumed out of the rolled-up carpet from Notarbartolo's Antwerp apartment. The Belgian courts came down hard. They found Notarbartolo guilty of orchestrating the heist and sentenced him to 10 years. With the cell phone records and the peculiarly precise salami sandwich evidence, the Belgian detectives persuaded French police to raid the home of Finotto's girlfriend on the French Riviera. They retrieved marked $100 bills that the detectives say belonged to one of the Diamond Center victims. Legal proceedings dragged on, but Finotto was finally arrested in Italy in November 2007 and is serving a five-year sentence there. When questioned by police in Italy, D'Onorio admitted that he had installed security cameras in Notarbartolo's office but denied any involvement in the crime. Nonetheless, his DNA was found on some adhesive tape left in the vault. He was extradited to Belgium in November 2007 to begin a five-year sentence. The high-strung Pietro Tavano is serving a five-year sentence in Italy for the crime. He has refused to allow his attorney to make any statements on his behalf. A fifth thief has never been identified, though police know of his existence via cell phone records and DNA traces. The King of Keys was never apprehended.