Jul 5, 2013 12:51 PM by NBC News
(NBC News) Somber moments in court, as the mother of Trayvon Martin testified about screams on a 911 call.
Sybrina Fulton's time on the stand was brief; Prosecutor Bernie De La Rionda asked Fulton if she recognized the screaming or yelling on the 911 tape.
Fulton responded with yes.
The defense questioned if she may have been pre-disposed to believing it was her son on the tape instead of George Zimmerman.
"You certainly had to hope it was your son screaming before you even heard it, correct?" said Zimmerman Defense Attorney Mark O'Mara.
"I didn't hope for anything. I simply listened to the tape," said Fulton.
Martin's older brother also testified it was Martin's voice during the tape.
During cross examination, the defense brought up an interview he did with a Miami television station in which he tells the reporter he's not positive it's his brother screaming.
"I didn't want to believe it was him, that is why during that interview, I said I wasn't sure- I guess listening to it was cloudy shock and denial and sadness. I didn't want to believe it was him," said Trayvon Martin's brother, Jahvaris Fulton.
The medical examiner who performed the autopsy on Martin also took the stand stating the official cause of death was a gunshot wound to the chest.
"I believe he was alive for one to ten minutes after he was shot," said Medical Examiner Dr. Shiping Bao.
He believed there was no chance Martin could have survived.
George Zimmerman has pleaded not guilty and says he shot Martin in self-defense.