A department chief is among five New York City jail employees who've been convicted on felony charges for allegedly beating an inmate who stared down the chief during a search of his cell.

Bronx prosecutors say former Assistant Chief of Security Eliseo Perez and officers Alfred Rivera, Tobias Parker, Jose Parra and David Rodriguez, were convicted Tuesday. They each face up to 15 years in prison.

Jeffrey Richard, a sixth guard who prosecutors alleged helped cover up the attack, was found not guilty.

Prosecutors say Perez ordered guards at Rikers Island to attack inmate Jahmal Lightfoot on June 11, 2012, after the inmate stared him down.

Authorities say Lightfoot suffered two broken eye sockets and other injuries.

Prosecutors say the guards also falsified reports to say Lightfoot had a weapon.