Police officials in Ohio are searching for a man who fatally shot a “random” victim and posted the footage on Facebook.
The suspect, Steve Stephens, later said in a separate video post that he had killed 13 people and would kill more.
Cleveland police officials confirmed one killing but said on Monday morning that they did not know of any other victims.
Police said “multiple forces” were looking for Mr. Stephens, who “needs to turn himself in”.
The BBC reports that the victim has been identified by Cleveland police as 74-year-old Robert Godwin.
The father of nine was shot and killed in a residential area of the city while walking home from Easter lunch, according to WOIO-TV.
City police chief, Calvin Williams, said in a Monday morning press conference: “Steve is still out there some place and we’re still asking Steve to turn himself in but if he doesn’t we’ll find him.”
In the graphic video the suspect approaches Mr. Godwin and asked him to say the name of a woman believed to be Mr. Stephen’s former girlfriend, before shooting the elderly man in the head.
The woman, Joy Lane, confirmed to CBS News that they had been in a “relationship for several years.”