Drive-In Massacre

Drive-In Massacre is a 1976 American B-movie slasher film written and directed by Stu Segall, and co-written by John F. Goff and George Buck Flower. A psychotic killer attempts to turn a drive-in movie theatre into a graveyard.

Two police detectives try to catch a serial killer who is stalking a rural California drive-in theater, randomly killing people with a sword.