Walk a Crooked Path

Walk a Crooked Path (1969) is a drama, crime directed by John Brason rated 3.8/10.

Set in an exclusive boy's school, about a man who plans to kill off his wealthy teacher wife by encouraging her to drink and pushing her into suicide. To assist him he recruits a young student who will claim that he was sexually assaulted by her. (from: http://ftvdb.bfi.org.uk/sift/title/390627)