Martin is almost a foot taller than zimmerman. Disparity of force could come into play giving more credence to zimmerman's story and the vicious attack by Martin on a guy who just wanted to ask what he was doing/allowed to be there/who he was visiting.
Martin, feeling much disrespected, viciously attacks zimmerman, Martin is the aggressor. Then zimmerman on his back, crying for help, is forced to shoot his assailant.
I welcome full access to all the evidence. Likely if it goes to grand jury and no indictment we'll never see that evidence as to protect the victim (zimmerman).
I love the image of a 6'8" 140lb human being - it's awesome.
A lot of this world comes down to credibility. On one hand you have a guy who previously assaulted a police officer, had complaints about him in his community, volunteered for watch, called 911 over 50 times, was 28 years old, has 911 quotes showing his bias, was overweight and basically a pretty big loser.
On the other hand you have a 17 year old kid who got As and Bs in school, had no record, played football for his high school, had a girlfriend and by all reports a good kid.
I'm not sure how anyone takes Zimmerman's testimony at face value - his background and history do not support it.
Take that lack of physical ability and suddenly a bloody nose and some scratches are a "vicious attack". The result of the "vicious attack" are Zimmerman is able to stand up, speak coherently to witness and police who are on site within a minute, be cognizant of his position and place the gun on the ground and claim self defense.
Witnesses also stated the two became separated during their fight which gives just as much probability that Zimmerman executed Martin after having him cowered and defenseless after pulling his gun out.
Zimmerman's past violent behavior and profile point to a person who wanted to forcibly detain Martin, initiated contact, was found to be a useless bag of flesh and got hit a few times. To redeem himself after they break apart, he pulls his gun and executes a screaming Maritn.