Your summary omits the most devestating part
Prosecutor: “So your interpretation of what [Rosenbaum] was trying to do is complete guesswork.”
Witness: “Well, he said ‘fuck you’ and then he reached for the weapon.”
I heard McGinness’ statements early on. It seemed like he WAS just trying to be a “reporter” and describing the events.
And then he turned into trying to be a medic. With camera rolling trying to figure out where Rosenbaum had been shot, etc.