There were yells for help before the shot. The prosecutors witness said he observed them for about 10 seconds, told them to stop and was calling the police. If you are correct why didn't Martin turn to the witness and again yell help. I never heard any where that Martin yelled or said, whoaaa, noooo, ahhh, noooo, then the gunshot.<quoted text> Each of the witnesses saw something different. When tussling either party can be on top as the fight ensues!! The last moment before the gun shot, the screams were not from Zimmerman. He had a round in the chamber without the safety on. He pulled that weapon and shot Martin while they were free from the wrestling . That's why you hear Martin screaming whoaaa, noooo, ahhh, noooo, then POP! He killed that kid as Martin was screaming for help. Listen to the recording. Zimmerman had all the help he needed in that holster.
The Kel-Tec PF-9 9mm semi-automatic pistol that was used does not have an external safety. No little lever to switch. It has an automatic hammer block safety, which prevents it from firing when dropped. It is also “double-action only,” which means the trigger must be pulled fully in order to fire.
There were at least 4 witnesses that I saw in the trial that identified the voice as Zimmerman's. If your contention is that Zimmerman wasn't afraid for his life, why didn't he pulled the gun sooner rather than take a beating?