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The doctor who performed an autopsy on Martin also took the stand. Associate Medical Examiner Shiping Bao started describing Martin as being in pain and suffering after he was shot, but defense attorneys objected and the judge directed Bao away from that line of questioning.
He later estimated that Martin lived one to 10 minutes after he was shot, and said the bullet went from the front to the back of the teen’s chest, piercing his heart.
"There was no chance he could survive," Bao said.
With jurors out of the courtroom, Bao acknowledged under defense questioning he had changed his opinion in recent weeks on two matters related to the teen’s death — how long Martin was alive after being shot and the effect of marijuana detected in Martin’s body at the time of his death.
Bao said last November that he believed Martin was alive one to three minutes. He also said Friday that marijuana could have affected Martin physically or mentally; he said the opposite last year.
The judge ruled before the trial that Martin’s past marijuana use couldn’t be introduced, and so the jury did not hear Bao’s opinion about the drug’s effect.
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