WATCH: Trayvon Martin's mother identifies her son's screaming voice

Trayvon Martin's mother, Sybrina Fulton, testified early Friday morning in George Zimmerman's murder trial. The defense played a chilling recording of the 911 call placed the night Martin was killed. When asked who was screaming in the background, Fulton replied, "Trayvon Benjamin Martin."

A voice recognition expert had said that only a family member would be able to identify the voice on the 911 call.

(via CNN)