Facebook is reviewing the way it moderates violent videos after a murder in the US was filmed on Facebook Live.
A manhunt is underway for Steve Stephens from Ohio after he apparently shot dead a victim at random.
74 year old Robert Godwin had been walking home after an Easter dinner when he was targeted.
The social network blocked the video 23 minutes after it was first reported although it had been online for about two hours.
Facebook's vice president of global operations admits "we need to do better."