This is "Night Feeder": where a serial killer wreaks havoc in San Francisco (or on some really bad indoor sets that are supposed to be San Francisco). The lead suspects are the local bum and a scary punk rock group with a bad history.
The big jam by the punk rockers is called "Suicide Child" and features the chorus "slit your wrists, you fucking bitch". The brains behind the group (I'll call him "Brian LOL") is the boy-toy of the…