was TM wailing for his life while held at gunpoint I think GZ's story implodes. IMO, that person wailing was not the assailant and was not engaged in any threat to GZ and there was plenty of time for GZ to DECIDE what to do, whether to shoot and kill him or de-escalate the encounter-for whatever reason he decided to shoot.
IMO, TM pissed GZ off. I think GZ grabbed TM, maybe by his arm to ensure he couldn't get away-I think TM may have flailed his other arm, maybe landed a punch...maybe, but not a very good one, just enough to REALLY tick GZ off and he then, if he hadn't already, pulled his gun and pointed it at TM from a very close position and let it sink in to TM that he was going to die and then he pulled the trigger. Or maybe the whole thing was done with the gun drawn and TM trying to get away while GZ hung onto him.
I don't think anyone of the witnesses can really accurately describe what happened-I think the best bet is forensics and the precise timeline that will be established. I just hope it's enough. The description of GZ after the shooting was not of an agitated and distraught individual who was engaged in a battle which makes sense in this context. There was no big fight. The more I think about it the more I feel it was like an execution with GZ feeling justified because TM was one of those a%$holes that had previously gotten away so he wasn't doing anything wrong in eliminating this threat. If GZ had ever just thought or considered that maybe TM was just a regular teenager nothing would have happened. But to GZ, TM was just a type, a prototype out of central casting running amok around his pristine kingdom and GZ was going to set things right this time.