The prosecution is expected to wrap up its case in the George Zimmerman trial today.
The mother of Trayvon Martin, Sybrina Fulton, could take the witness stand in what is expected to be the most emotional day in the trial.
Fulton may be speaking about screams heard on the 911 tapes to determine whether her son is the one crying out for help.
CNN's George Howell is live in Sanford, Florida covering the trial.
“That is exactly what prosecutors are banking on,” Howell says.
"Who would better know their child's cries for help, better than a mother? They hope that resonates with the jury of six women, five of them, mothers.”
Judge Deborah Nelson had ruled out forensic testimony from voice recording experts to determine the answer. “But left the door open for someone more familiar with the person's voice to identify it,” Howell says.
A mother could be that someone.
“Analysts say the defense may choose not to cross examine," Howell reports, "instead it's likely they'll call on George Zimmerman's father to counter testify.”
Ultimately the jury of 6 women will have to decide.
Watch CNN for live coverage and follow CNN.com as story develops.