Nightly News | July 05, 2013
>>> meantime, florida , a dramatic day in the second degree murder trial of george zimmerman as the mothers of both trayvon martin and zimmerman took the stand. nbc's ron mott in sanford, florida , for us tonight. good evening.
>> reporter: good evening to you. the mothers didn't take the stand very long today. but it should resonate with this all-woman jury, all parent but one and they know their son's voices when they hear it. two mothers two opinions, about whether it is trayvon martin or george zimmerman screaming on tape.
>> my youngest son is trayvon benjamin martin , he's in heaven.
>> reporter: sybrna fulton says i pray that god gives me strength to properly represent him in heaven. he may not be perfect, but he's mine. the prosecutor played the 911 call that captured the shooting.
>> so you think he's yelling help?
>> reporter: then asked a question, considered central to this case who is screaming for help?
>> ma'am, that screaming or yelling, do you recognize that?
>> and who do you recognize that to be, ma'am?
>> trayvon benjamin martin .
>> reporter: zimmerman 's mother heard differently. she testified hours later for the defense.
>> whose voice is screaming in the background?
>> yes, sir.
>> whose voice was that?
>> my son george .
>> reporter: the cross-examination of martin 's mother interrupted.
>> i apologize for your loss.
>> reporter: trying several times unsuccessfully to get martin 's mother to consider the possibility that zimmerman was the person screaming.
>> if you were to listen to that tape and not hear your son's voice, that would mean that it would have been george zimmerman 's voice?
>> and not hear my son screaming? is that what you are asking?
>> i heard my son screaming.
>> reporter: zimmerman plead not guilty to second degree murder.
>> i heard him yell, but not like that, yes.
>> reporter: final witness, martin 's older brother and the medical examiner.
>> i believe trayvon martin was alive for one to ten minutes after he was shot.
>> reporter: who concluded martin was not killed instantly.
>> he can still feel pain in other words.
>> reporter: the defense challenged the doctor from revising his earlier estimate to one to three minutes. the defense made a motion for acquittal which judge nelson quickly denies. the state called a total of 38 witnesses before resting its cased today. the defense is likely to go until wednesday or thursday next week before the jury is handed the case. carl.
>> ron mott in sanford, florida ,