Yes sorry you're right the AK drum mags are 200 rounds each and not 100. My mistake.
I agree with you 100% that there was more than one shooter. Ballistic forensics are advanced enough today that they should easily be able to determine the trajectories of most of those rounds. This would be enough to tell them how many shooters there were and where they were positioned.
You have combat experience so you know how difficult it would be for one person to let off all of those rounds in that time frame, with so many rounds hitting people.
If 500+ people were hit with one or more rounds, that mean he probably had to let off over 1000 rounds at least. I still don't see one person doing that much damage in 8 minutes.
It wasn't a standard 200 round AK mag it was one of those plastic double drums (I'm not sure what they're called) I'm a 1 shot 1 kill guy. It wouldn't be difficult for one guy to do that much damage in that time... It would be impossible! I was a sniper and I'm not that good.
I've been following the story and I'm hearing chatter about a shooter in the crowd. There's a good video on Y-Tube by Jay Myers Documentaries... it has a lot of esoteric stuff, but other than that it's pretty concise.