So basically, in hind sight, from my arm chair quarterback position, I would have had one or two officers approach from the center to do the "knock and talk" while two officers approached from the sides with weapons ready. The officers need to clear and safe the areas they are passing just as they would if they were inside a building where a bad guy could be waiting to ambush them.
I agree and to add to your point, an officer in an over watch/covering position. One man, preferably armed with a rifle but something is better than nothing, could have hung back at the street behind a cruiser with better view of the entire situation as it unfolded, probably could have IDd and dropped the shooter as he was getting off his first round, maybe sooner.
Sgt. of Marines, 5th Award Expert Rifle, 237/250
1st Award Expert Pistol, 382/400
D Co, 4th CEB, Engineers UP!! OEF 21JUN-20SEP2011