that is deffinately not and AR.. it could however be a POS High Point rifle, which would be classified as an assault rifle, but it fires pistol rounds, not rifle rounds...

i almost certian that there are bullets that were still inside, and in the walls and such,that could be examined.. they should have no problem determining if it was a .223, or a 9mm, or a .45, or pretty much anything larger than the .223..

there should be ZERO debate on what gun was used...

and if there was no "assault rifle" used, then it shouldnt even be attacked...