All the evidence points to self-defense as you say. The prosecution’s entire case rests on a claim that GZ “provoked” TM into attacking him, secure in knowing he had a gun and therefor the trump card if the fight didn’t go his way. It isn’t “self defense” to provoke someone into hitting you and then shoot them dead.
How do they expect to win without any evidence of the initial confrontation ? Simple. They’ll bring in witnesses who will lie about Trayvon’s good character and GZ’s past comments will be twisted until they sound racist. Then hope a jury will convict him out of fear for their own lives if they acquit him.
If the prosecution gets a jury packed with liberals it will be a slam dunk for conviction. Liberals just can’t think beyond their overwhelming bias. Defense lawyers should go over potential jurors with a fine tooth comb.