Win For Defense: Jury to hear Martin's pot use.

John Donnelly, a former Vietnam War combat medic, grew emotional on the stand in the George Zimmerman trial Monday as he explained why he thought the screams heard on a 911 call made the night Trayvon Martin died were made by his friend Zimmerman.

Donnelly was just one of a slew of defense witnesses who testified on the trial’s 10th day about the controversial 911 call, which has become a key point of contention in the case.

Choking back tears, Donnelly explained that the reason he could identify the screams is due to his experience with the fog of war. During combat, Donnelly had to recognize the screams of his fellow soldiers and run to them when they needed help. He said he has heard a 250-pound man scream like a little girl.


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