. >> a video of philando castillo dying while disturbing cast a powerful spotlight on traffic stops andial justice. >> he shot his arm off. >> his girlfriend diamond reynolds kept streaming providing possible evidence in a trial of geronimoian ez who pleaded not guilty. >> he is licensed to carry, he was trying to get out his id and wallet out of his pocket. >> i chose to allow the video to go live 10 seconds before my phone died because i wanted everybody in the world to see what the police do and how they roll. it's not right. >> in response to the steve stevens video, they are reviewing the reporting to be sure people can report videos and other material that violates the standards as easily and quickly as possible. they are constantly exploring ways that new technologies can make them sure facebook is a safe environment including artificial intelligence. >> a couple of empties on the internet of a video can go viral because it can be copied and shared widely in a number of different places. these companies have a real reason to want to make sure it's not there in the first place. >>