Does anyone remember this crazy film? It was a precursor to "The Exorcist" starring Shirley MacLaine as a Manhattan socialite bitch whose hot hippie brother (Perry King) becomes possessed by a Puerto Rican serial killer who beheads women. It's downbeat and very creepy, atmospheric, and has solid performances. There is some weird incest subtext between MacLaine and King, as well as moments that suggest King's character might be a closet case. Even weirder is a moment when MacLaine finds King's girlfriend's corpse and severed head—there is a slow, bizarre crossfade where MacLaine is licking her lips and craning her neck as though she is having an orgasm.
I first saw it about 10–15 years ago when it came out on DVD for the first time, and rewatched it for the first time in years this weekend. It's better than I remembered it being, but weird. In some ways, I think it's creepier than "The Exorcist" as it doesn't have any wild gross-out theatrics. It had a lot of internet lore around it back in the early-2000s, as it was difficult to find. The ending was controversial because it shows a fully-naked adolescent boy (King's possessed character forces his nephew to strip his clothes off, and then makes his niece eat dog food).