Officer shoots black man after 'mistaking gun for taser'

Police say a white reserve police officer thought he was holding a stun gun, not his handgun, when he shot dead a black suspect during an arrest that was caught on video in Tulsa, Oklahoma.

The video of the April 2 incident shows a Tulsa County deputy chase and tackle Eric Harris, 44, who they accuse of trying to sell an illegal gun to an undercover officer.