Speaking Friday on NBC's "Today" show, O'Mara said he couldn't talk about the individual pieces of evidence in the case. But he said that rather than talking about the "what-if's" — as in what if Zimmerman had stayed in the car — O'Mara said "we have to deal with what happened and try to explain that."

Joelle Moreno, a Florida International University law school professor, said the evidence now released makes it difficult to predict if a "stand your ground" defense will work. She is a member of a state senator's task force examining the law.

Larry Kobilinsky, professor of forensic science at John Jay College of Criminal Justice in New York, said that after reviewing the evidence, he thinks Zimmerman is in a good position.

"I think the prosecution's case has been seriously diminished by all of this evidence," he said.

Still, many of the pertinent questions remain unclear: What