I hope this is not a dupe, if so, feel free to delete.
The U-Tube link below is very interesting and can only make one wonder if the medical examiner is competent or utilizing his position to further the gun control arguement. Perhaps I have been out of the loop, but, the way it looks to me there was no assault rifle involved in the shooting, only four handguns. Additionally, it sounds as though the gun in the trunk was a shotgun not an AR15! Turn on the sound, Watch the video, the whole thing, then chime in.
http://www.youtube.com/watch?v=de3lmAD5kXo