JACKSONVILLE, Fla. -- Central Florida investigators involved in the search for Caylee, a 2-year-old Florida girl who has been missing for more than a month, said on Tuesday that the case is starting to look like a homicide.

A sheriff's detective testified that a car driven by the Anthony smelled of decomposition when investigators recovered it.

Casey Anthony's Pontiac was towed after being parked for days at an Orlando check-cashing business.

Cpl. Yuri Melich said that it appeared that a stain, some dirt and 2-year-old Caylee's hair were in the trunk.

"I actually went into the car to smell what the smell smelled like," Melich said. "Before, just before I came into (current position), I was a homicide detective for two years with the Orange County Sheriff's Office and in my experience, the smell that I smelled inside that car was of decomposition."

A judge set bond at $500,000 for the girl's mother, who was charged with obstructing the investigation after investigators say she lied to them.

Circuit Judge Stan Strickland said he's concerned that evidence presented in court possibly implicates 22-year-old Anthony in Caylee's death.

Anthony's attorney, Jose Baez, said investigators have made the process more difficult by taking Casey into custody when they did.

"My client told me that she does not know where Caylee is," Baez said. "We are going to do everything we can to assist law enforcement in any way possible while still trying to protect my client's interest. I have to do my job here. They decided to arrest her at a certain point and launch criminal charges and that is what has made this communication a little more difficult."

Anthony was arrested last week after reporting her daughter missing. The girl hasn't been seen since last month.

Anthony's attorney said there is circumstantial evidence of a possible homicide, but not enough to give prosecutors the confidence to charge Anthony with homicide, kidnapping or any similar offense.

Testimony during Tuesday's bond hearing for Anthony revealed some new details and a possible connection involving Jacksonville.

Anthony's mother testified that her daughter and a friend, Jeff Hopkins, vacationed in Jacksonville sometime between June 16 and July 15 -- during the time police said Caylee was already missing.

According to a police report, Hopkins is one of only two people Anthony told about her missing daughter. What the two were doing in Jacksonville or where they stayed in the city remains a mystery.

Investigators in Jacksonville told Channel 4 the investigation is centered in Orlando and they could not comment any further.

"Of course it is their case, so we cannot confirm or deny any investigation going on here," said Jacksonville Sheriff's Office spokesman Ken Jefferson.

Meanwhile, in Orlando, Anthony's mother said she would pay the bond to free her daughter.

"Absolutely," the 22-year-old's mother said. "She hasn't committed a crime. She needs to be home with her family. She can't speak to anybody where she is at. She stated that she was afraid to tell the police. She told them that."

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