In January, four people in Chicago were arrested after they allegedly beat and taunted a mentally disabled man live on the social media site.
Perhaps the most disturbing part of this case is the video the suspect recorded while running wild on a killing spree.
The public is being warned not to approach Steve Stephens - who officials say works for a behavioral health agency that supports families and children.
The mayor of Cleveland, Frank Jackson, said that he wanted Mr Stephens to know that "he will eventually be caught".
Stephens said in the video that he has killed more than a dozen people, police said, though they have announced no other victims.
Nancy Kortemeyer of Beech Brook confirmed Stephens is an employee.
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Police said the shooter broadcasted the deadly shooting live on his social media page and claimed to have committed other homicides.
In the video, which has since been taken down from the social media website, a auto door is seen opening as the suspect mutters and swears to himself: "Found me somebody I'm going to kill, this guy right here, this old dude". His Facebook posts mentioned that he had "lost everything to gambling, "according to NBC News". Residents of Pennsylvania, New York, Indiana and MI, in particular, were asked to be on the alert and told not to approach Stephens if they spot him.
Then as he please "I don't know, I don't know nobody by that name", a gun can be seen and a gunshot heard.
USA police are searching the Cleveland area and is urging Stephens to turn himself in after he shot and killed an elderly passerby this morning claiming to be angry at a woman.
Robert Godwin Sr. seen in photo posted online.
Steve Stephens remained at large Sunday night, possibly driving a newer model white Ford Fusion.
The victim's son, Robert Godwin Jr, told Cleveland.com that he father was probably collecting cans when he was killed. He is described as standing six feet, one inch tall and weighing 244 pounds. Police warned the public not to approach him as he was considered armed and risky. Anyone with information is urged to call 911.