A retired New York City police sergeant has been convicted for acting as a dealer at illegal poker games on Staten Island.

On Thursday, 55-year-old Ralph Mastrantonio (pictured left) was convicted in a Brooklyn federal courthouse on charges of illegal gambling and conspiracy for his work at a poker den dubbed Fifth Street. The floating operation was professionally run, with printed game schedules and branded ‘Fifth Street’ poker chips.

Police sent an undercover detective equipped with a hidden video camera to document the goings-on, then shut down the operation in June 2011. Police arrested 15 individuals, most of whom eventually reached plea deals with federal prosecutors that resulted in probationary sentences.

The Queen’s District Attorney caught wind of the game after getting a tip that Richard Palase, a New York City police detective, was associating with organized crime figures at the games. Palase pled guilty to illegal gambling on Feb. 11 and is awaiting sentencing.