Night Watch (1973 film)

Night Watch is a 1973 British suspencethriller film directed by Brian G. Hutton.

Ellen is revealed to be recovering from a mental breakdown that occurred after her unfaithful first husband, Carl, was killed a few years earlier in an auto accident with his paramour. Ellen was traumatized by having to identify the bodies in the local morgue. Inspector Walker confides to John that Ellen may be mentally ill and suggests rest and a doctor. Ellen continues to maintain that she saw a murder in the deserted house, but there is no proof and John remains skeptical. Ellens visiting friend Sarah Cooke Billie Whitelaw is equally skeptical and tries humoring Ellen by suggesting that she sees what she thinks she sees because of her recent breakdown.When both Ellen and Sarah see a man enter the old house the following night, they call the police, who find Mr. Appleby wandering around with a flashlight and arrest him for trespassing. A second search of the house and excavation of the garden reveal nothing, and Inspector Walker closes the case. ........

Source: Wikipedia