George Zimmerman's attorneys are raising new questions about the 911 calls released from the night Trayvon Martin was killed.
As Zimmerman's defense gears up for trial, set for June 10, attorneys are questioning the accuracy of expert witness testimony about those calls.
Friday, defense attorney Mark O'Mara filed a motion asking the court for a hearing at the Seminole County Courthouse as soon as possible regarding the analysis of the 911 calls. Considered to be some of the most important pieces of evidence in the upcoming trial, those calls could be used to determine who was yelling for help the night George Zimmerman shot and killed 17-year-old Trayvon Martin in Sanford.
The state is expected to call several expert witnesses during the trial to analyze the 911 calls made by people living in Sanford's Retreat at Twin Lakes subdivision, where the shooting happened on Feb. 26, 2012.
O'Mara, citing Florida law, said the methods those expert witnesses used to analyze the 911 calls must be generally accepted methods used in the field of voice identification in order to be allowed at trial.
One of the main questions about the calls: Who was yelling in the background, Zimmerman or Martin?
911 Dispatcher: 911. Police, fire or medical?
Caller (unidentified female): Um, maybe both. I'm not sure. There's just someone screaming outside.
911 Dispatcher: OK. Is it a male or female?
Caller: It sounds like a male.
911 Dispatcher: And you don't know why?
Caller: I don't know why. I think they're yelling "help," but I don't know. Just send someone quick, please.
911 Dispatcher: Does he look hurt to you?
Caller: I can't see him and I don't want to go out there. I don't know what's going on.
911 Dispatcher: Do you think he's yelling "help"?
Caller: Yes.
911 Dispatcher: All right.
Zimmerman's defense team told us they don't want this issue to be dealt with at the next regularly scheduled pretrial hearing, set for May 28. Instead, they want a hearing before that to focus specifically on these 911 calls.