It starts to look like 2nd degree.
Testimony from the gym stated that GZ did not know how to punch. Which puts him at a disadvantage. It takes a lot of skill and technique to escape a full mount. If GZ does not have the skill sets and he response was he shimmied out during a struggle like that he is better than most MMA fighters.
The only way out is if TM let him up. If GZ said ok "you got me" which is the response of a school yard fight. TM may have very well let him up and gave GZ the ability to pull the gun.
So you think GZ says 'you got me' after screaming for help for 40 seconds, as if the screaming for 40 seconds for help wouldn't have gotten TM off GZ already? <mod snip>