DETROIT, MI -- Had it not been for the plethora of surveillance cameras placed throughout downtown Detroit, David Linnell Troupe might have had the score of a lifetime about 8 a.m. Nov. 27.

The FBI says Troupe nonchalantly walked up to a Loomis Armored Truck company van. He worked for the cash transport business, but called in sick that day -- he'd later tell investigators he had food poisoning -- and Troupe looked the part. Sporting a navy Loomis jacket, black pants, and a black cap with a winter hat pulled over it, a federal complaint accusing Troupe of bank robbery says he knocked on the side of the white van.

Two other on-duty Loomis delivery employees minutes earlier grabbed cash from the rear and set off to stock Chase Bank ATM machines in the vicinity of Detroit's Greektown District, including machines inside the Greektown Casino.

Open up the back doors, investigators say Troupe told the driver in front.

Troupe acted as he was one of the other delivery workers who'd grabbed the wrong money bag and returned to collect the proper one.

The driver opened the doors. Troupe placed a $578,000 in a red duffle bag and walked east on Monroe Street, soon after placing the duffle bag into a white rolling bag and putting on a gray jacket over his Loomis coat, according to federal complaint.

It seems investigators had their suspect pretty soon after the theft was reported on that Black Friday. A surveillance image was presented to a supervisor who said he was "90 percent sure it was Troupe." He could tell because of the distinct, black, large-frame glasses Troupe was known to wear.

Detectives also spotted a suspected accomplice in surveillance talking with Troupe just before the heist. Moments before Troupe knocked on the van, the accomplice approached the driver and asked about getting a job with Loomis and then set off into Greektown Casino.

FBI agents interviewed Troup on Nov. 30 and he claimed to be nowhere near Greektown on Nov. 27, the day he called in sick to his own route.

Detectives verified Troupe's cell phone number and obtained a warrant for cell phone records that contradict Troupe's denial and show his phone was active in Greektown the morning of the theft.

Law enforcement arrested Troupe at his home on Burlingame Thursday afternoon. His charge carries a punishment of up to 10 years in prison.

FBI spokeswoman Jill Washburn hasn't revealed if the stolen cash was recovered, whether the FBI believes the Loomis driver was involved or if the accomplice has been identified.

Read complaint: Loomis robbery.pdf