"Significant levels" of chloroform were found in the car used by missing tot Caylee Anthony's mom Casey, MyFOXOrlando.com reported Wednesday, citing sources close to the investigation.
The significance of the find to the Caylee case is not clear, but sources said one of the computers taken from the Anthony home showed someone was searching for information on chloroform and how to use it, the TV station reported.
Chloroform, a solvent, once was used as an anesthetic, because inhaling the vapors depresses the central nervous system, though inhaling too much can be fatal.
Caylee was 2 when she disappeared in mid-June. Casey Anthony, 22, been charged with child neglect any lying to the authorities investigating her daughter's disappearance.
Police this week said they fear the little girl may be dead.
Leonard Padilla, the California bounty hunter who helped secure the release of Casey by posting the required $500,000 bond and then withdrew it, told MyFOXOrlando.com he is willing to get it reinstated.
The condition is that Casey has to tell investigators where Caylee's body is, and if she complies and cooperates with them, he will repost the bond, allowing Casey to remain free while she awaits trial.
He told MyFOXOrlando.com the offer was made to the Anthony family and her attorney, and he asked that it be relayed to her in jail.
Padilla, who originally thought Caylee was alive, said he now thinks the little girl is dead.
But searchers, despite their scant numbers and suggestions Caylee is dead, haven't given up on finding the girl.
EquuSearch volunteers said they're more determined than ever to find her. The 30 to 40 people combing the Orlando area for Caylee, who would have turned 3 last month, are "not pulling out until they find this baby or exhaust every lead," search director Mandy Albritton told the Orlando Sentinel.
Emotions were running high, she added.
Meanwhile, the little girl's mother remained behind bars since her latest arrest on unrelated check fraud charges. A visit with her parents was planned Thursday morning.
The Associated Press contributed to this report.