If he was such a threat then how come only one of the two officers discharged his weapon???
The sheriffs deputy who fired his weapon was riding in the front right passenger seat of the patrol car. Being closest to the teenager he had the best view when the teen began to turn around to the right with the gun in his hand. He would also be the first police in the line of fire with only a car door for protection. The other deputy who was driving was positioned at more of an angle to the teenager, had an engine block between him and the potential threat and may not have been able to see the gun barrel from where he was before the other deputy started shooting.