Facebook, which makes money primarily by selling advertising that appears on people's news feeds, relies largely on its 1.9 billion users to report posts that violate its terms of service, and it employs thousands of workers to examine those reports.
The suspect-Steve Stephens-allegedly shot an elderly man in the head, then uploaded the video on to his Facebook page, where it stayed for several hours.
After a lighthearted introduction in which the CEO of Facebook compared its F8 developer conference to the latest film in "The Fast and the Furious" franchise (which is also referred to as "F8"), Zuckerberg turned solemn. Stephens' video of the murder was live on the site for more than two hours before it was removed.
Pennsylvania State troopers hit Cleveland Facebook killer Steve Stephens' vehicle from behind in order to stop him, a witness said.
While speaking about the company's plans to unveil products to "keep communities safe", Zuckerberg said. He sped away, and police then hit his auto with their vehicle, causing him to lose control and spin out, at which point Stephens shot himself, Teper said.
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Steve Stephens, the so-called "Facebook killer", sparked a multi-state manhunt after he brazenly gunned down a Cleveland man at random, recording the encounter on his phone and uploading the video to Facebook.
It was about 100 miles from Cleveland, where he fatally shot a stranger, 74-year-old Robert Godwin, Sr, in the street in broad daylight on Sunday.
Police would not speculate on what was behind the killing, but in the video and other footage he posted, Stephens talked about losing everything he had to gambling and having trouble with his girlfriend. "And she said, 'Your father is dead'".
Cleveland Mayor Frank Jackson told a news conference: "We have closure in regards to the search for Steve Stephens". Detectives spoke with the suspect on Sunday by cellphone and tried to persuade him to surrender, police said. From the beginning, when Stephens recorded the shooting of Robert Godwin Sr. on Facebook, it spread like wildfire on social networks. "We prefer it had not ended this way", he said.
Facebook posted a response to the incident on its blog Monday afternoon, penned by VP of Global Operations Justin Osofsky.