then he had no reason to run, hide, and then attack the neighborhood watchman. But he did and he got shot.
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He may have run out of fear...although his girlfriend claimed he was not going to run. However, we really don't know who attacked who first. Based on at least two calls, there was a confrontation, words, then a wrestling match...but, it's unclear who started that. Personally, I think anyone carrying a gun would be foolish to start a physical wrestling match and risk it being taken from him, or it falling it out.