Blood Rage

Blood Rage is a 1987 American slasher film directed by John Grissmer, written by Bruce Rubin, and starring Louise Lasser, Mark Soper, and Julie Gordon. Set on Thanksgiving, the film follows a woman and her adult son who are stalked at their remote apartment community by the son's unhinged twin brother who has escaped from a psychiatric institution after allegedly murdering a man years earlier.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.