How many times must you be reminded that Zimmerman doesn't have to prove himself innocent. The state must prove him guilty of a crime beyond a reasonable doubt. There is plenty of physical evidence and witness testimony to corroborate Zimmerman's version of events.
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How many times are you going to ignore a request that you provide links to any document, tape or transcript from a reliable source (read LEO) that shows evidence or witness testimony that Martin attacked Zimmerman?
You keep refering to these witness statements...how hard could it be to provide a link to one?