Just as a matter of speculation--NOT an assertion.

Could it be that Zimmerman shot Martin after being told to back off, figured, "Uh-oh! I'm in deep do-do now!" and his alleged wounds are self-inflicted, so he could claim Martin had attacked him and that he acted in self-defense?

Since nobody actually SAW what happened, speculation is rife. On ALL sides.

Nobody except Zimmerman KNOWS what really happened, and he is liable to be a bit biased.

Don Firth