Court documents also reveal that Casey has made some friends in jail, even though she's not supposed to have contact with other inmates.

She apparently wrote about 50 letters to another woman who was being held in protective custody at the Orange County Jail, and prosecutors have those now. Investigators say they don't contain a confession, but they do include relevant information.

Jose Baez wouldn't discuss the letters after Thursday's hearing to determine if Casey is indigent.

"I'm not going to comment on any of that until the court has an opportunity to hear any arguments," said Baez. "That is an issue that the court hasn't heard, and we're going to let the court hear things first and then we'll take it from there."

Casey's legal team has 15 days to review the letters before they're released to the public.

Judge Stan Strickland is expected to rule Friday on whether or not Casey is indigent and eligible for public funds to cover the costs of her defense. But he raised some major questions about the matter during the hearing.

"If they were given x-amount in the past, and that's not well accounted for, why would I want to entrust them with the public's money?" Strickland asked.

Baez testified that Casey is broke.

"You have any reason to believe that Casey Anthony, having been in jail for the last 20 consecutive months, has any money anywhere?" asked J. Cheney Mason, the newest member of Casey's legal team.

"Absolutely not," said Baez. "I don't anticipate any. I'm certainly not aware of any money."

Baez was forced to admit that the team had received $200,000 from ABC News for photos and videos, $70,000 from a former attorney on the case and 5,000 from an anonymous donor. He told the court that all of that money was gone.

But that wasn't enough information for Strickland. He's requiring Baez to provide a detailed account of how the money was spent before he makes a decision.