A US gunman who shot a grandfather on the street apparently at random and posted the footage on Facebook could be anywhere, say investigators.
The suspect Steve Stephens said in another video post that he had killed 13 people and would kill more.
He shot dead 74‑year‑old Robert Godwin in Ohio as the victim walked home from Easter lunch on Sunday afternoon.
Police have asked residents of Ohio, Indiana, Michigan, New York and Pennsylvania to be on the alert.
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