Jurors deciding the fate of Pedro Hernandez, the man accused of kidnapping and killing six-year-old Etan Patz in 1979, have once again been dismissed without a verdict.

On the fourth full day of deliberations in the case, the big question was whether the words of an accused murderer are enough to convict him.

The judge said no, telling jurors that a person may not be convicted solely upon confessions or admissions without additional proof that a crime has been committed.

With no body or physical evidence, will the boy's disappearance suffice for jurors?

How about things the prosecution said Hernandez knew that he couldn't have unless he was guilty of kindapping and murder?

After confessing to authorites, Hernandez brought detectives to Thompson Street. They say he pointed to 115 Thompson, saying there was no door back that in 1979, and that he put the body of Etan in the alleyway there after strangling him. In fact, there wasn't a door back then, and down some steps, as described, is an alleyway.

The defense disputes this, saying it was 113 Thompson that Hernandez pointed to during the walk with police through SoHo.

This is just one of the issues the jury has to wrestle with. 

"They're taking it step by step. There's nothing that they've asked, nor do they seem to be at odds with each other," said Harvey Fishbein, Hernandez's attorney. "This jury is intent. They're all taking notes when they come out. They're listening to what the judge has to say or the testimony that's being read back. I think they're working their way through the evidence. What that all means, I can't tell you. But I don't see a divided jury at this point."

The defense says Hernandez's low IQ made him an easy target for a false confession. There were four of them on video.

Jurors also heard testimony read back from two psychiatrists who said Hernandez expressed guilt in confessing to them. The defense maintains he's mentally ill, hallucinated the attack and believed it.

The jury returns Wednesday morning for the fifth full day of deliberations.