The Dark Hour (1936) Mystery Film by Charles Lamont

Plot : When Elsa Carson's (Irene Ware) Uncle, Henry Carson (William V. Mong), is found murdered there is no shortage of suspects. To start with these include her other Uncle, Charles Carson (Hobart Bosworth), her fiancé, Jim Landis (Ray Walker), who is investigating the case; her Aunt, Mrs. Tallman (Hedda Hopper); and Foot, the Butler (E.E. Clive).

Elsa also doesn't know that retired Police Detective, Paul Bernard (Berton Churchill), has been on the trail of her Uncle Charles and the Butler for years, or that others might have their own motives for the murder.

Things then start to look bleak for Elsa when the murder weapon and a disguise are found in her room.