ORLANDO, Fla. -- The family of a missing 2-year-old Orlando girl is believed to be working with a bail bondsman Thursday to free the child's mother as a national search for the child continues.

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IMAGES: Missing Girl, Mother Images

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Sources said the bail for Casey Anthony, 22, could be paid as early as Thursday.

Anthony did not report her daughter, Caylee, missing for five weeks, detectives said, and the 22-year-old has been called a person of interest in the child's disappearance.

A judge set a $500,000 bond for Anthony earlier this week but changed the conditions of her bond release order Wednesday.

She's now been ordered to home confinement with an electronic monitoring device and no GPS bracelet.

A bondsman said the change in conditions raises the risk, but also gives Anthony the freedom to roam.

Attorney Grilled During Interview

Meanwhile, CNN's Nancy Grace grilled Casey Anthony's attorney Jose Baez and asked why his client did not report her daughter missing and why she lied to police.

"Don't you think your client should know the last time she was with her own daughter?" Grace asked.

"Since it was so long ago…" Baez said.

"It was last month, it was last month," Grace said.

"Where was your client during the four weeks Caylee was missing?" Grace asked.

"Part of that is some of the things that I simply can't discuss because it is protected by attorney-client privilege," Baez said.

"But why?" Grace said. "Why is that a secret if she wants to find her little girl alive."

"You are an attorney as well and you wouldn't want to violate the attorney-client privledge," Baez said.

"I would want to find the little girl alive," Grace said.

"I'm a little confused why you would ask that question," Baez said.

"Because I want to find Caylee alive and obviously you and your client do not," Grace said.

"She does not know where Caylee is," Baez said.

Baez said rumors that Anthony would talk to police in exchange for immunity were not true.

Billboards Planned

Caylee's grandparents, Cindy and George Anthony are trying new ways to bring in tips in the case.

Local 6 reported that the Anthony family will be putting up 14 billboards across the state asking for help in the case.

They've also organized volunteers to call people in Central Florida to spread the word.

Plus, a $225,000 reward is being offered for information leading to the return of a missing Orlando 2-year-old girl.

About $200,000 of the reward is from Skyview Aviation and Exotic Car Rental and the remaining money is from the Never Lose Hope foundation.

Tipster Questioned

Wednesday night, investigators spoke with a woman who believes she recently spoke with Caylee at Orlando International Airport.

The woman said she spotted the girl boarding a flight to Atlanta and even talked with the girl.

Detectives created a composite sketch but said they would not release it until they firmly believe the tip is credible.

Possible Connection Between Car, Yard

Investigators said similar human decomposition smells found in a yard and a car during a search for a missing Orlando girl indicate the source may have been moved.

Last week, cadaver dogs searched the Orange County back yard of Cindy and George Anthony for signs of their missing granddaughter, who was not reported missing for five weeks.

During the search, cadaver dogs found the smell of human decomposition in the yard, Local 6 learned.

The dogs also hit on the same smell in the trunk of the car the Casey Anthony had been driving, police said.

"We had two different dogs from two different counties that hit on the same exact spot," Orange County sheriff's investigator Carlos Padilla said.

The sheriff's office believes it is possible that whatever produced the decomposition smell could have been in the back yard and then moved to the car, Bolden reported.

"Could it have been a body or could it have been clothes?" Padilla asked. "Again, that is something that has to be investigated."

The investigation includes processing other items found in Anthony's car.

"Because they found hair samples in the trunk of the car that are similar in color and length to that of Caylee and they also found a stain in the trunk that came up under black light that is questionable," Orange County Detective Yuri Melich said. "They also found some dirt inside the car that needs to be processed."

Detectives said they don't have enough evidence to file additional charges against Anthony but it could become a potential homicide investigation.

"Is it something that could later on bring more charges?" Padilla said. "That is a possibility. But right now, we have to process that evidence."

Officers said they still have not ruled out the possibility that Caylee could still be alive.

Anyone with information concerning the whereabouts of Caylee is urged to call Crimeline at 800-423-TIPS.

Watch Local 6 News for more on this developing story.