The mother of Trayvon Martin has testified that screams for help captured on audio of a 911 call came from her 17-year-old son.

 

Trayvon Martin's parents Tracy Martin, left, and Sybrina Fulton
Trayvon Martin's parents Tracy Martin, left, and Sybrina Fulton (Jacob Langston-Pool/Getty Images)
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Sybrina Fulton took the witness stand Friday morning during the trial of George Zimmerman, the former neighborhood watch volunteer charged with murder in Martin's shooting death. Zimmerman has pleaded not guilty and says he shot the teen in self-defense during a fight.

After the audio was played, prosecutor Bernie de la Rionda asked Fulton, "Who do you recognize that to be?" She replied, "Trayvon Benjamin Martin."

Identifying the screams on the 911 call could be critical to the case because it may help determine who was the aggressor during the scuffle between Zimmerman and Martin.

(Copyright 2013 The Associated Press. All Rights Reserved)

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