If the jury still can't reach a unanimous decision, "The judge will have to declare this a hung jury and everyone would have to go home, to try this case another day."

Nichols said Judge Russell Healey will not make this decision quickly or easily because retrying the case would be time-consuming and expensive. He said a second trial probably could not happen before summer.

As for the effect of the gender and racial makeup of the jury, studies have found that it's easier for people of similar backgrounds to talk to each other and reach consensus. The 12 people sitting in judgment of Dunn include four white women, four white men, two black women an Asian woman and an Hispanic man.

Studies reveal women are more compassionate than men in most criminal cases, although in cases involving sex crimes, women jurors are more ruthless. Jury experts say men tend to be harder on defendants who they believe are guilty or lying.

Nichols believes this jury will ultimately reach a verdict in this case.

"It's not very common to have a hung jury. At some point and time jurors recognize they need to make a decision," Nichols said.

The only time the public has seen Healey so far Friday was just after deliberations began when he told spectators and lawyers they were no longer able to wait in the courtroom for a verdict since there was concern that those in the jury room could hear muffled sounds coming from the adjoining courtroom.

The jury will remain sequestered for the duration of the trial. Healey also made the decision Thursday afternoon to also keep all four alternate jurors sequestered in case any of them was needed to step in for one of the 12 jurors currently in deliberations.

The court administration said that the media will be given at least 30 minutes notice when and if a verdict is reached before it will be announced.