You only have GZ’s word for when TM first saw the gun. And we know that GZ is a liar and a sneak...a liar and a sneak who has a violent history.
TM was also a “liar and a sneak” with a history of theft, drugs and violence.
Why are you ignoring this part? Does it harm your agenda?
Please post TM’s version of the events that led to GZ killing him and then we can talk about it.