The spirit of the gang leader is the main antagonist in the season 4 episode The Apartment
The gang leader is a more sinister and evil presence who terrorizes the newly married couple Bill and Myrisa Spencer. In life he was responsible of the murder of a teenage spirit in a drug related crime, who also haunts the apartment. It's shown that the man attacked Bill after flicking a cigarette at him. He is seen as a more demonic like entity, some features is that he was a gunman of a unknown gang. He wears a leather jacket a buttoned shirt, and pants, and carried a revolver type gun.