If you've been following the trial, Zimmerman's wounds (doctor called them insignificant) don't seem to justify 'legit' self-defense. Zimmerman's own exaggeration about how many times his head was slammed (he said 20 to 30 times, doctor said once) demonstrate the tall-tale-ness of the self-defense angle. It won't look good for Zimmerman, if the prosecution can prove that it was Martin's voice yelling for help, and that it might have been Zimmerman who instigated the physical altercation. Zimmerman's attempt to manipulate how the police handle the case is just another piece in the second degree murder charge. I don't know whether the jury will agree, but the prosecution is going to try to show that Zimmerman had motive to deal out justice by death. It's the notion of vigilante "justice" that can demonstrate a will to kill. From the state's perspective, you can't let things like this go, you can't have dudes walking around armed thinking that they can police their neighborhood with deadly force. I know it prickles some of our libertarian sensibilities, but I think it's an important case symbolically, especially in a place like Florida where there's laws that empower vigilante "justice." Again, I don't know if the prosecution can prove the case, but there's plenty of Zimmerman's lack of remorse, preparation to deal out justice (ignoring recommendations to discontinue pursuit, knowing what to say to cops, wanting to be a cop, being armed, neighborhood watch, etc.), and the actual forensic evidence of the case (witnesses, no blood on Martin's hands, 'insignificant' injuries, 911 calls, recorded pleas for help)--the case is provable. It looks like murder to me, and Zimmerman's own paranoia and lunacy (believing his life was in danger, that Martin was a criminal at all) don't at all mitigate his crime.