[Yo-Yo]

What do his head injuries have to do with the fact that Martin and Zimmerman fought for control of Zimmerman’s gun?

[RC one]

it's all about reasonable doubt. The prosecution has to eliminate all of it, or as much of it as possible so the jury is left with the impression that in now way did Zimmerman act in self defense. They're basically trying to paint him as a lying bigot who was out looking to kill him a negro that night. The prosecution needs to establish that his injuries would lead a reasonable person to fear for their life or fear that they might sustain great bodily harm of some kind.

Head injuries, even minor ones, are always cause for concern regardless of their appearance or their ultimate severity. Would a reasonable medical professional tell a parent to not go to the ER if their child sustained a head injury that resulted in bleeding from the nose and posterior skull for example? No. they would not. Not a chance in hell. The defense needs to be all over this IMO.