Fear No More (1961)

A young woman on a business trip travels by train from L.A. to San Francisco and finds herself implicated in a murder in this crime drama. The trouble begins as she retires to her sleeping compartment and is knocked unconscious. The next day she wakes up beside the dead body of the woman she had been sharing it with. A police detective arrests her and escorts her off the train. She escapes and is picked up by a passing motorist. He takes her to her home where she discovers another corpse, a friend of hers who was an alcoholic writer. She was letting him stay at her apartment while she was gone. The distraught woman tells the motorist all she knows. She then admits that she is a former mental patient. The motorist becomes suspicious and takes the woman back to her boss, who denies that he sent her on the business trip. Trouble ensues until they learn that the boss was behind it all. The first corpse was his wife. He put the body beside the girl so that so she would be suspected of being a homicidal maniac. The boss kidnaps his hapless employee and takes her to the mountains where he plans to kill her and make it look like a suicide. Fortunately, the motorist trails them and saves the day. ~ Sandra Brennan, Rovi