Two Sacramento police officers heard on a dashboard-camera video discussing how they might run down a fleeing black man with their patrol car before killing him in a burst of gunfire should be charged with murder, a lawyer for his family said on Monday.

Attorney John Burris said in a phone interview the dashcam video released by the city last week strongly suggested the officers who shot Joseph Mann more than a dozen times on July 11 had already made up their minds to harm him before getting out of their squad car and opening fire.

Sacramento police have said two officers were responding to emergency calls in the California state capital about a man armed with a gun and a knife, although Mann, 51, was later found to have only a knife.