Jannie totsiens

Jannie totsiens is a 1970 South African psychological horror film directed by Jans Rautenbach and starring Cobus Rossouw, Katinka Heyns, Jill Kirkland and Don Leonard. A new arrival to a mental institute is ostracised by the other patients, until they use him as a scapegoat when another patient dies. It has been viewed as representing an allegory of South African society at the time.

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