(Joe Burbank-Pool/Getty Images)

Forensic Pathologist Says Trayvon Martin Was on Top of Zimmerman

A defense witness says Trayvon Martin was on top in the scuffle and could have moved after he was shot.

(Joe Burbank-Pool/Getty Images)

Dr. Vincent DiMaio, a forensic pathologist and gunshot wound expert, describes the injuries of George Zimmerman while testifying for the defense.

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After another day of testimony, defense attorneys for George Zimmerman said they will likely tie up their case this week, bringing the murder of Trayvon Martin one step closer to a verdict.

[READ: 911 Calls Becoming Heart of Zimmerman Trial]

The defense expects to wrap up its case on Wednesday, defense attorney Mark O'Mara said. At that point, the state will have the opportunity to call rebuttal witnesses. Jurors on Tuesday heard from a widely-known forensic pathologist who testified the evidence shows Martin may have been on top of Zimmerman when he was shot.

Zimmerman, 29, is charged with second-degree murder for fatally shooting Martin, 17, last February. Zimmerman pleaded not guilty and has said the teenager was beating him, so he shot Martin in self defense.

Vincent Di Maio, a former chief medical examiner from Texas, told the jury that the evidence was consistent with Zimmerman's account. The powder burns found on Martin's shirt show that the shirt was two to four inches from his body, indicating he was leaning over Zimmerman when he was shot, Di Maio said.

"If you are lying on your back your clothing is going to be against your chest," Di Maio said, according to ABC News. "The clothing is consistent with someone leaning over the person doing the shooting."

[ALSO: Mother, Brother Say 911 Screams Belong to Trayvon Martin]

Di Maio also said that Martin could have been able to speak for 10 to 15 seconds after he was shot, but that he most likely died within one to three minutes of the shooting.

In that time, however, Di Maio said Martin could have moved his arms under his body. Zimmerman has said he spread the teenager's arms after he shot him, but police on the scene said Martin's arms were under his body.

Di Maio's testimony regarding the time frame in which Martin died after the gunshot contradicted that of a prosecution witness who testified earlier in the trial. Shiping Bao, the associate medical examiner who conducted Martin's autopsy, testified Martin likely lived for several more minutes after he was shot. Bao told the jury that Martin could have been suffering for up to 10 minutes and that the bullet wound would have instantly incapacitated him.

"His heart was still beating," Bao said. "He was still alive, he was still in pain."

[PHOTOS: Protesters Seek Justice for Trayvon Martin]

On Tuesday, jurors also heard from Sanford's City Manager, Norton Bonaparte, who said he played for Martin's family a 911 call that captured screams in the background.

Bonaparte said the meeting was not recorded and police were not present, but he played the calls for the family as a courtesy, the Orlando Sentinel reported.

The 911 call is an important piece of evidence in the case. Martin's family maintains that it is the teenager who can be heard screaming for help, while Zimmerman's family says it is his voice. Determining who was yelling for help could help point out who was the aggressor in the encounter.

 

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