Police across the US are hunting a man suspected of fatally shooting a stranger in the street and uploading footage of the attack on Facebook.
The "armed and dangerous" suspect, Steve Stephens, is on the run and has claimed to have committed more than a dozen other killings, according to police in Cleveland, Ohio.
The video shows a man pulling over in a car as he says "find me somebody to kill, gonna kill this guy right here. He's an old dude".
He gets out and asks the man: "Do me a favour: can you say Joy Lane?"
"Joy Lane?" he asks.
"Yeah," says the killer. "She's the reason this is about to happen to you." He then asks him how old he is.
The man goes silent for a few seconds, before saying "Look, I don't know anybody by that name" - as he tries to shield himself with a bag.
A gunshot is heard and the camera pans over the pavement to show the man lifeless on the ground with a head wound.
"That mother****** there because of you, Joy," says the killer - who then gets back in his car.
Police have named the victim as Robert Godwin Sr, 74.
The victim's son, Robert Godwin Jr, told Cleveland.com that his father was probably collecting cans when he was killed.
"I haven't watched the video. I haven't even looked at my cellphone or the news," he said. "I don't really want to see it."
Officials say 37-year-old Stephens works for a behavioural health agency that supports families and children.
He is described as a black male, 6ft 1ins and 244lbs with a full beard.
Joy Lane said she had been in a relationship with Stephens for several years and described him as a "really nice guy".
"I am sorry that all of this has happened," she told CBS News.
"Steve...is generous with everyone he knows. He was kind and loving to me and my children.
"This is a very difficult time for me and my family."
Stephens claimed in Facebook posts to have killed at least 14 people, but police said they had not yet found any more victims.
Investigators believe Stephens may have left Ohio and warned residents in Pennsylvania, New York, Indiana and Michigan to be on the lookout. Later, Cleveland police chief Calvin Williams said the hunt had become a national search.
Federal authorities have offered a $50,000 reward for information leading to his arrest.
The video of the killing was up for about three hours before it was removed.
Facebook called it a "horrific crime" and said it worked hard to "keep a safe environment" on the site.