GZ must have started the confrontation by pulling TM on top of him, and in the process battered the back of his head on the sidewalk multiple times and breaking his nose. At the same time he verbally assaulted TM by loudly crying out for help for 40 seconds. Throughout his vicious, premeditated assault, the only injury GM was able to inflict on TM was to scuff up his knuckles -- until he pulled his 9mm and blew away the innocent teenager in cold blood.
There's a saying among lawyers:
?If you have the law on your side, you argue the law. If you have the truth on your side, you argue the truth. If you have neither, bang on the table with your fist, loudly and with as much conviction as possible.?
The state has neither the law or the facts on their side, so all they can do is bang the table loudly by making up supposed limitations on GZ's behavior, e.g., it's illegal to follow someone (law citation, please), it's illegal to get out of one's car (law citation, please), it's illegal to recon (law citation, please), it's illegal to conclude that someone looks suspicious (law citation, please), it's illegal to shoot someone who is beating the living hell out of you and threatening, by word and deed, to kill you if that person is 1) unarmed or 2) a minor (law citation, please), etc. In post-Constitutional America we are no longer a nation of laws and facts are largely irrelevant. All that matters to many is how good of an emotional story you can weave to arrive at the pre-ordained outcome.