https://www.cnbc.com/2019/03/15/facebook-youtube-and-twitter-struggle-to-remove-mosque-shooting-videos.html

The shooter in at least one of the two mosque attacks in New Zealand Friday used social media to stream his deadly rampage live.

Shortly after, tech giants scrambled to remove his accounts, but versions of the video remained on some sites hours after the shootings, which killed at least 49 people.