I think it's really immaterial whether they shot him 5 or 50 or 71 times - it's what happened just before shots 1-5 or so that really matters, since that's probably all it took. Did they announce themselves or not? To me that's the central question - I think it's pretty reasonable to assume I'm going to die if SWAT knocks down my door and I'm pointing an assault rifle at them (shooting or not).