Interesting observation, but it's not conclusive evidence by a long shot.
Is there a timestamp on the original video footage? Without that I don't believe this is worth anything.
Think about this scenario - The incident went on for a long time, hours, so what if after the gunman was shot, partially injured people fled from the scene, maybe a few hundred meters. Then, after a few minutes they were found/helped by other people, and carried back to the initial crime scene (where the majority of the ambulances would be situated).
Makes sense right?
