Brott i sol (1963)

After having spent six years in an asylum, Harry returns home. He soon remembers what happened six years ago. He had five of his friends over and one of them, Raoul, was murdered. In order to find out which of them is the murderer, he invites them over to reconstruct the crime. It seems that everybody, including himself (as his doctor points out), had a motive, so it will not be easy to discover whodunit.