The conviction comes after the first trial ended in a hung jury.
The shooting happened on the evening of November 3, 2009 at the victim's home on Albert Place in New Rochelle.
Andre Everett went out onto his driveway to talk to a group of acquaintances who were seated in the Pileggi's car.
Pileggi was seated in the front passenger seat of his car, playing with his off-duty gun, a Glock 9mm, with a laser sight affixed to it.
At some point, while the victim was standing by the rear driver's door, Pileggi discharged the weapon and the bullet struck the victim in the throat.
New Rochelle police were called and Everett was taken to Sound Shore Medical Center where he was pronounced dead.
"This defendant was a police officer who had worked in two Westchester County police departments and had repeated training in the use and safeguarding of his firearm," said District Attorney Janet DiFiore following the jury's verdict. "For former police officer Pileggi to claim that the shooting of his friend was an accident and not a conscious disregard for due care and safety is absurd and simply a ploy to avoid accountability for his reckless actions, actions for which this jury found him responsible."
Pileggi faces a maximum of fifteen years in state prison when he is sentenced in January. He remains in County jail until that hearing.