This weekend another black man was shot and killed by police officers and this time it happened in South Los Angeles.

The man's been identified as 18 year old Carnell Snell Jr, who's the third black man in five days to die after confrontations with police in Southern California. In each incident, eyewitness accounts or video have proven important to showing what happened in the moments before the confrontations, but the graphic accounts can also add to the pain for friends or family.

Do the recordings also change public opinion at all?

Jody Armour is a professor of law at the University of Southern California and he joins A Martinez for a discussion on the topic.