Re-open investigation of Zimmerman "injuries". His head injuries are not consistent with repetitive banging on concrete!

Zimmerman's injuries lack credibility: If his head was banged multiple times on concrete there would have been more injuries to the head and traces of concrete residue would have been present. Zimmerman would've been incoherent and unstable after such a head trauma, instead, according to him, he was able to get up and walk away without any assistance. He even refused further medical treatment. He also claimed that it was raining heavily on the date of the incident to make a claim that his blood or DNA on Trayvon's hand would have been washed away by the rain. However, his head and face appeared very dry in the magnified picture presented to the jury and the blood on his head did not appear to be mixed with rain! These injuries could have been self-inflcted to secure a claim of self-defense