A lot of it depends on the bullet. The article mentions something about the .45 being used because of the lower chance of pass through. I take that as the bullet fragments more meaning more internal damage but also may be to protect "innocents" in the area.
Yeah a 5.56 would blow a head wide open 3 yards away but go through the wall, into the next house, and then put a .45 size hole in some innocent kids head.
Only if they're using FMJ. I bet these boys were equipped with some serious ghetto gangland cop killahs, yo.
I heard he was dead and that they put one of those old pirate ships inside his skull for the fish to swim around.