DFRPG - NYC: You don't have to go home, but you shouldn't stick around here.
Special Investigations (SI) division of the NYC Police Department, which handles cases in which something unexplainable or supernatural is involved and covering them up. Traditionally SI has been a dumping ground for officers who have made mistakes, and frequently SI officers leave the force. The commander, in particular, usually only lasts a few months. Currently in the hands of Ray Kelly and being taken more seriously as the supernatural world has encroached further and further into mundane lives.