The Midnight Warning is a 1932 American mystery film directed by Spencer Gordon Bennet and starring William "Stage" Boyd, Claudia Dell and Huntley Gordon.
[1] The film is also known as Eyes of Mystery (new American title).
Shortly thereafter, the brother is missing, & despite the sister's inquiries, no one admits to ever having seen the man.
Meanwhile, a sniper shoots bullets through the window of the room that the brother & sister stayed in.
[2] It is based on the legend of the Vanishing Hotel Room.