Giuseppe Esposito was the first known Sicilian Mafia member to emigrate to the U.S. He and six other Sicilians fled to New York after murdering the chancellor and a vice chancellor of a Sicilian province and 11 wealthy landowners. He was arrested in New Orleans in 1881 and extradited to Italy.

New Orleans was also the site of the first major Mafia incident in this country. On October 15, 1890, New Orleans Police Superintendent David Hennessey was murdered execution-style. Hundreds of Sicilians were arrested, and 19 were eventually indicted for the murder. An acquittal generated rumors of widespread bribery and intimidated witnesses. Outraged citizens of New Orleans organized a lynch mob and killed 11 of the 19 defendants. Two were hanged, nine were shot, and the remaining eight escaped.

The American Mafia has evolved over the years as various gangs assumed, and lost, dominance over the years—for example, the Black Hand gangs around 1900, the Five Points Gang in the 1910s and ‘20s in New York City, and Al Capone’s Syndicate in Chicago in the 1920s. It was not until 1951 that a U.S. Senate committee led by Democrat Estes Kefauver of Tennessee determined that a “sinister criminal organization,” later known as La Cosa Nostra, operated in this nation. Six years later, The New York State Police uncovered a meeting of major La Cosa Nostra figures from around the country in the small upstate New York town of Apalachin. Many of the attendees were arrested. The event was the catalyst that changed the way law enforcement battles organized crime.

Early History—Masseria and Maranzano

By the end of the ‘20s, two primary factions had emerged in the Italian criminal groups in New York. Joseph Masseria, who controlled the groups, sparked the so-called “Castellammarese War” in 1928 when he tried to gain control of organized crime across the country. The war ended in 1931 when Salvatore Maranzano conspired with Masseria’s top soldier, Charles “Lucky” Luciano, to have Masseria killed. Maranzano emerged as the most powerful Mafia boss in the nation, setting up five separate criminal groups in New York and calling himself “Boss of Bosses.”

Maranzano was the first leader of the organization now dubbed "La Cosa Nostra." He established its code of conduct, set up the “family” divisions and structure, and enacted procedures for resolving disputes. Two of the most powerful La Cosa Nostra families—known today as the Genovese and Gambino families—emerged from Maranzano’s restructuring efforts. He named Luciano the first boss of what would later be known as the Genovese family. Luciano showed his appreciation less than five months later by sending five men dressed as police officers to Maranzano’s office to murder him.

Luciano, Costello, and Genovese

With Maranzano out of the way, Luciano become the most powerful Mafia boss in America and used his position to run La Cosa Nostra like a major corporation. Luciano set up the “Commission” to rule all La Cosa Nostra activities. The Commission included bosses from seven families and divided the different rackets among the families.

In 1936, Luciano was sentenced to 30 to 50 years in prison for operating a prostitution ring. Ten years later, he was released from prison and deported to Italy, never to return. There, he became a liaison between the Sicilian Mafia and La Cosa Nostra. When he was convicted, Frank Costello became acting boss because underboss Vito Genovese had fled to Italy to avoid a murder charge. Genovese's return to the states was cleared when a key witness against him was poisoned and the charges were dropped.

Costello led the family for approximately 20 years until May of 1957, when Genovese took control by sending soldier Vincent “the Chin” Gigante to murder him. Costello survived the attack but relinquished control of the family to Genovese, who named it after himself. Attempted murder charges against Gigante were dismissed when Costello refused to identify him as the shooter. In 1959, it was Genovese’s turn to go to prison following a conviction of conspiracy to violate narcotics laws. He received a 15-year sentence but continued to run the family through his underlings from his prison cell in Atlanta, Georgia.