"S.Sgt X" surrendered, we know that. If there are two to three hours of video footage (and/or other sensors), evidence is coming on board - depends on its quality. We have already seen the forensics team picking up casings.
What supprises me and also, I must say, piss me off a little, it the fact there are like 2 to 3 hours of video surveillance.
And nobody saw it happening?, No body reacted?
What are the video surveillance made for then?

I know this is kind of naive reaction but I would think that if you have video surveillance it is to actually have early warning mechanisms and immediat response team ready.

The man went mad for sure but it also feels like the whole system has failed somehow.