Tropicana Casino & Resort Atlantic City did not speak English, claimed Doyle's wife was a fraud, and ended his friendship with Conan Doyle. In 1929, the Ambassador was the site of the infamous Atlantic City Conference, in which a number of organized crime bosses, including Al Capone, Meyer Lansky and Lucky Luciano, negotiated their territorial rights after a wave of violence. In 1931, as Philadelphia gangster Mickey Duffy slept in the hotel, he was shot and killed by assailants who were never caught. The incident was dramatized in the series "Boardwalk Empire", with a character called Mieczyslaw "Mickey Doyle" Kuzik. The hotel eventually closed in the
Umberto Valenti (gangster) Umberto Valenti (gangster) Umberto "The Ghost" Valenti (August 14, 1891 – August 11, 1922) was a Sicilian-born New York City gangster and prominent member of the D'Aquila crime family during the 1910s. He is frequently confused with Rocco Valenti, a Camorra gunman of the same era. Valenti was born in Barcellona Pozzo di Gotto, Sicily and immigrated to America in 1910. After settling in the Lower East Side of New York, he joined the Mafia family led by capo di tutti capi Salvatore D'Aquila. He was said to have been the shooter in the May 1914 murder of D'Aquila's chief