There is a can on the ground near the victim. One witness said the victim was going to spray some mace when he was shot dead.
I speculate the orange cloud is a mace cloud. Mace first, then shot. Somebody will report what precipitated the mace. More speculation, shooter was provoking, was “in your face,” saw mace coming and was ready. IOW, planned by the shooter. “Self defense man, I thought he had a gun.”