Strange Behavior

Strange Behavior is a 1981 slasher film written, directed and co-produced by Michael Laughlin, co-written with Bill Condon, and starring Michael Murphy, Louise Fletcher and Dan Shor. Its plot follows a series of bizarre murders being perpetrated against teenagers in a small Midwestern town, at the same time that the local university is engaging in covert mind control experiments on the youth.

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