Popcorn (1991)
A master of disguise deranged killer begins killing off the college students who are organizing a horror movie marathon in an abandoned theater
The Great Masquerade (1974)
In order to infiltrate a gang of drug smugglers, a cop is sent undercover to participate in a drag queen beauty contest aboard a cruise ship
Deranged: Confessions of a Necrophile (1974)
A deranged rural farmer becomes a grave robber and murderer after the death of his possessive mother, whose corpse he keeps, among others, as his companion in a decaying farmhouse