NOT a snuff film by any means; in fact, most of it is a Manson murder-like flick. The 'snuff' part at the end is cheesy and fakey.
Some flicks I remember being on cable in the early-mid 80s:
VISITING HOURS (1982)
Not too bad for its ilk. The ever-creepy Michael Ironside is in it!
HOSPITAL MASSACRE/X-RAY (1982)
GREAT flick with some great gore at the end!
NEW YEAR'S EVIL (1980)
MOTHER'S DAY (1980)
DEADLY EYES (1982)