The George Zimmerman murder trial continues today in Florida, where the defense may rest its case in the 2012 high-profile killing of Trayvon Martin.
Persuading jurors of who was the aggressor in the fight that left Martin dead has become primary goal of prosecutors and defense attorneys alike.
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So far, it looks like the defense may be narrowly winning that argument, and with the burden of proof on the prosecution, chances of a conviction are murky.
For instance, evidence supports Zimmerman's claim that Trayvon Martin was on top of him during the fight, a forensic pathologist testified Tuesday.
"The medical evidence is consistent with Mr. Zimmerman's statement," said Vincent Di Maio, an expert witness for the defense, during his questioning.
The pathologist also found that Trayvon lived no more than three minutes after the shooting and probably was conscious for at least 10-15 seconds.
Di Maio also testified that Zimmerman's bloody head injuries could have been caused by contact with concrete and such injuries can be very dangerous.
That testimony supported Zimmerman's claim that Martin was slamming his head into a sidewalk, although he admitted there could be other possibilities.
Di Maio said rolling around on concrete with Martin could've also done it, and he did not take into account witnesses who said Zimmerman was the aggressor.
Also at issue were the disputed shouts on the 911 calls and whether it was Trayvon or Zimmerman heard screaming for help in one of the tapes.
Zimmerman, 29, is charged with second-degree murder. The neighborhood watch volunteer says he acted in self-defense when he shot and killed Marin, 17.
Speculation that Zimmerman, who is Hispanic, profiled, followed and murdered the black teen sparked racial controversy and protests around the country.
Zimmerman, who faces life in prison if convicted, has maintained that race did not factor into his actions at all, and that he was attacked by Martin.