In 1946, a man claiming to be a detective gave a pedestrian a camera and asked her to take a picture of a suspect. The “detective” turned out to be a gangster, the “suspect” turned out to be his ex-wife, and the “camera” turned out to be a concealed sawed-off shotgun.
Extra info: The gangster claimed it was a special X-ray camera that would reveal if the suspect was carrying stolen jewels. The pedestrian was fooled and unwittingly shot the woman in the leg.
Source: Unbelievable Facts