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Zimmerman Trial: A Mother Speaks

Emotional testimony from Trayvon's mom caps a dramatic day as state rests its case and defense begins.

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Earlier, the state concluded its case on the testimony of medical examiner Dr. Shipping Bao, who performed the autopsy of Trayvon's body. Bao spent most of the afternoon on the stand, sometimes helping and at other moments possibly hurting the state.

Bao said there were small abrasions on two of the fingers on the teen's left hand. Because Trayvon was right-handed, the state is expected to note later that the absence of similar injuries on the right hand casts doubt on Zimmerman's claim that the teen punched him 25 to 30 times.

Bao said he has "no opinion, zero" on what Zimmerman's and Trayvon's body positions were when the shot was fired. Zimmerman says he got on top of Trayvon and spread his arms apart after shooting him. But witnesses and police say they arrived and found Trayvon's arms tucked beneath his body, which was lying face down.

Bao said Trayvon probably lived for up to 10 minutes after Zimmerman's bullet cut through his heart. "He was still alive, he was still in pain," he said.

He set off a red flag for defense attorneys because Bao had changed his opinion. He initially thought Trayvon lived for no longer than three minutes after the shooting, but lengthened the estimate based on a more recent autopsy involving a similar fatal wound, he said.

Bao also changed his opinion on another critical finding regarding the THC, the active ingredient in marijuana, found in Trayvon's system. Bao at first said the amount of THC was too small to have influenced Trayvon's behavior on the night of the shooting. He said he revised his opinion, believing it could have affected the teen, after consulting experts.

On cross-examination by the defense, Bao repeatedly said he had no memory of performing the autopsy: "I do not remember anything, zero … I depend on my notes."

As Bao appeared to read from his notes as if they were a script, defense attorney Don West asked to see them. Bao refused until the judge ordered him to comply.

Bao frequently expressed hostility during West's questioning and sometimes toward the state's questions. The judge repeatedly ordered Bao not to interrupt the attorneys.  

At one point, as West grilled Bao, Bao said, "Nobody knows more about Trayvon Martin's autopsy than me." West shot back, "Except you don't remember anything about the autopsy?" Bao replied, "Yes, without my notes."