Facebook CEO Mark Zuckerberg took time out of his keynote speech Tuesday to address the recent live murder in Cleveland by Steve Stephens on the social network.<br />Zuckerberg said, "We have a lot more to do We're reminded of this this week by the tragedy in Cleveland.<br />Our hearts go out to the family and friends of Robert Godwin Sr., and we have a lot more work and we will keep doing all we can to prevent tragedies like this from happening."<br />It took Facebook more than two hours to take down footage of the grizzly murder of 74-year-old Robert Godwin Sr committed by Stephens.<br />Stephens ranted on his ex-girlfriend and claimed he killed 13 people during the five minute broadcast.<br />He was found dead by Pennsylvania police Tuesday after he shot himself in the head following a car chase.
