FILE - In a Friday, July 5, 2013, file pool photo, Trayvon Martin's mother, Sybrina Fulton, takes the stand during George Zimmerman's trial in Seminole County circuit court, in Sanford, Fla. ... more 
FILE - In a Friday, July 5, 2013, file pool photo, Trayvon Martin's mother, Sybrina Fulton, takes the stand during George Zimmerman's trial in Seminole County circuit court, in Sanford, Fla. Zimmerman's mother and Martin's mother each testified Friday that it was her son, not the other woman's, who can be heard screaming for help on a 911 call. Identifying the voice could be critical to the case because it could help the jury determine who the aggressor was during the scuffle. (AP Photo/Orlando Sentinel, Gary W. Green, Pool, File) less 
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Associated Press | Photo By Orlando Sentinel, Gary W. Green, Pool, File
Sat, Jul 6, 2013 1:35 PM EDT