That is a HUGE stretch. All acknowledge how dark it was.
You make a valid point regarding GZ'z admission of fear.
Raising the question of why he would got out of a car while being "afraid", is also valid. The prosecution better add to those two points in a very big way, and soon.
Here’s the thing...it really is unclear to me how much interaction Martin had with GZ. Did matin peer in the car? Did GS follow him. How long did he follow him. Was any of it in lighted areas.
GZ was following him so could he see the gun...especially if they are high as a kite and paranoid.
Etc.
But even if he couldn’t see the gun until the tussle...a person can feel threatened without a gun.
If you know nothing about Martins background and think he is just an innocent kid going to the store to get tea and skittles...it’s not so far fetched to think somebody was following him and it scared him.
Of course WE know that he wasn’t just an innocent kid but what does the Jury know?