I don't have Trayvon's autopsy report yet, but GZ having marks on him does not prove that Trayvon put his hands on GZ first. The fact that George Zimmerman was reaching for his phone/gun and Trayvon seen the gun, makes it 100%, IMO, Trayvon's right to defend himself against George Zimmerman. I'm having a hard time with the forum tonight, so I would also like to answer the previous question you had...
I believe by the time George had caught back up with Trayvon, it was too late for Trayvon to run away again. The gun was seen by Trayvon. I believe that George had every intention of not letting Trayvon get away. I believe he did try to detain him/grab him and that is where the pushing sounds came in. I wish Trayvon would have kept running. I wished he didn't slow down when he thought he had lost George. But he did... and that was the only mistake he made that night... but not one he should have died for.
MOO