Bambuser makes no editorial judgments about video uploaded to its servers, Gross said.
Facebook, about an hour after pulling Reynolds' video, reinstated it with a warning about graphic content. It claimed the temporary deletion was a result of a "technical glitch."
Longtime Facebook observers, though, note the social network's history of deleting first, if it deems possibly problematic content, and apologizing later (as it eventually did in this case).
Facebook founder Mark Zuckerberg later wrote in a post that the live-streamed images "shine a light on the fear that millions of members of our community live with every day.
"While I hope we never have to see another video like Diamond's, it reminds us why coming together to build a more open and connected world is so important -- and how far we still have to go," Zuckerberg added.
The launch of Facebook Live earlier this year has brought new urgency to the question of how the site should approach moderation as tragedies unfold in real time.
Even before Reynolds' video, Facebook was grappling with where to draw the line. For example, in June the site removed a live video made by a French Islamic State sympathizer who was shot after he killed a police officer and the officer's romantic partner.
A day later, a video that appeared to depict the fatal shooting of a Chicago man was allowed to remain up, although with a graphic-content warning.
After the Chicago video, Facebook expanded the team that reviews live content, although it did not say how many people are now part of the team. The company said its workers use a variety of factors, including the number of user reports, number of viewers and type of reports, to determine which videos to review first.
It also plans to monitor some live broadcasts once they reach a certain popularity threshold and will take action -- including interrupting the stream -- if it sees a violation of its community standards.
"We do understand and recognize that there are unique challenges when it comes to content and safety for Live videos," Facebook said in the statement. "It's a serious responsibility, and we work hard to strike the right balance between enabling expression while providing a safe and respectful experience."
Washington Post reports were used in this story.