Stein

Captain Stein is a crazy police captain of the Starling City Police Department. He is also one of Quentin Lance and the late Lucas Hilton's superior officers, and the leader of the SWAT unit. Possibly he was suspended or demoted from his possessing of police captain. and the leader the SWAT unit, is very likely that he was fired his Police Department, for not only going off playing cowboy, also for Frank Bertinelli killing (albeit by accident) and shooting like a crazy person, Quentin possibly reported his actions to the police board, however he may have bend the truth a little, to avoid revealing that he was helping The Arrow.