New surveillance video released shows the fatal punch that had knocked an off-duty sheriff's deputy unconscious.
San Bernardino County sheriff's deputy Larry Falce is seen standing on the sidewalk after he was involved in what was later described as a minor fender bender.
The video shows he and the other driver exchanging words and gestures before the man walks up to Falce and hits him square in the head.
Falce falls to the ground and never regained consciousness.
A witness to the events says the driver, later identified as Alonzo Smith, then returned to his vehicle and tried to drive off when he used his SUV to ram his vehicle.
“I was just so, so shocked. My instincts just kind of kicked in.
He jumped in his car and tried to leave, so I rammed him once and then I backed up and he was able to go around my actual truck, so I rammed him a second time in the back of his car and spun him out across the street and into a … tree."
Smith was taken into custody later and was arrested on suspicion of murder with a bail set at $1 million.