George Zimmerman Trial: Pool of 40 potential jurors chosen for further questioning

(CBS/AP) - After screening prospective jurors for more than a week about publicity they've been exposed to in the George Zimmerman case, attorneys have identified 40 potential jurors to move on to a second round of questioning.

PICTURES: George Zimmerman in court

READ: Trayvon Martin Shooting: A timeline of events

By the start of court Tuesday, 32 prospective panel members had gotten through the pretrial publicity round and been asked to return for further questioning. The attorneys and Circuit Judge Debra Nelson were aiming for 40 before moving on to more traditional questioning, which is to begin at 9 a.m. Wednesday.

Attorneys will be able to ask the 40 prospects more detailed questions about how they feel about the case.

Jury selection will continue until about 3:45, Circuit Judge Debra Nelson said, when the court will once again take up the issue of whether audio experts who analyzed a disputed 911 call will be permitted to testify at trial.

Experts have come to differing conclusions on screams heard in the background of the call, placed the night Zimmerman shot unarmed teen Trayvon Martin in a Sanford, Fla. gated community. One state expert said he heard Martin saying "I'm begging you" in the background of the call.

Zimmerman says he shot the teen in self-defense.

The four prospective jurors questioned Tuesday morning expressed no strong opinions about the case. They included a mixed-race man in his 50s, a mixed-race woman in her 20s, a white woman in her 20s and a black man in his 50s.

Of the 32 candidates who had been asked back by Tuesday morning, more than two-thirds are white. The pool also is overwhelmingly female and skews toward candidates who are middle-aged.

Complete coverage of the George Zimmerman-Trayvon Martin case on Crimesider