Both mom's claim that the voice heard screaming on the 911 tape to be their son's
"Trayvon Benjamin Martin," Fulton said.
Gladys Zimmerman listened to the 911 call and defense attorney Mark O'Mara questioned her about the voice in the background.
"That's my son, George," she said.O'Mara then asked how she knew whose voice it was on the call.
"Because he's my son," she replied.
will Rachel Jantel be called back to the witness stand?