A nationwide manhunt is under way in the US for the suspect who shot dead a grandfather on the street apparently at random and posted the footage.
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.
Facebook has launched a review of its procedures after criticism that the footage stayed on the site for hours.
