Hidden Witness (bottom left image) is the 18th in the Turn Of Fate television short movies and is from 1958.
Robert Ryan stars as a crooked policeman (Jeff Banner) who is assigned to protect an informant, Ann Palmer (played by Barbara Euler), but reveals her location to the gang that she’s testifying against.
With his feelings changing towards the woman, he tries to save her when the mobsters arrive at the cabin.
In the ensuing shootout, only the girl survives.
Movie pages here.