Where is your evidence for this? The 17 year old would not be dead if he hadn’t attacked a person who was concerned for his neighbors. It was not because GZ followed him. Do you really believe it is alright to hit someone because they are following you?

If TM had not hit GZ he would be alive. Put the fault where it belongs. The actions of TM got him killed.
It is dabatable that he was innocent. He was found with stolen goods. There is no proof that he followed him after the dispatcher told him we don’t need you to do that. GZ was not on NW.