Good points,all.
Have they denied it? I hadn't heard that.
Probably matters little even if they do deny it, since this is one of those incidents filmed by all kinds of people from all kinds of angles.
The trouble is, we all know very little at the beginning of these breaking stories, and we have to wait sooooo long for the dozens or hundreds of cell-phone videos to all be posted to random spots on the www, and then for others (like us) to seek them all out and pool them together and review each one carefully, figuring out the timelines of each, putting together snippets of videos or of background sounds you hear but don't see, and on and on ... until you get a (hopefully) somewhat-accurate account of what happened.