Caylee Anthony: "We're Probably Looking For a Body"

Orange County sheriff's investigators turned their attention Sunday to the possibility that missing 3-year-old Caylee Marie Anthony is dead, and joined with hundreds of volunteers to canvass wooded areas in southeast Orlando in search of the toddler.

"Since we've gotten things back from the FBI lab, we know that we're probably looking for a body," said Sgt. John Allen, the lead investigator in the case. "We're to the point in the investigation where we think it'd be good to go back and retrace some of our steps."

Caylee Marie was last seen in mid-June and was reported missing to authorities July 15. During a bail hearing in July for her mother, Casey Anthony, investigators said they had found strands of hair, a stain and dirt in the trunk of the woman's car, which had been abandoned in a parking lot.

On Wednesday, the Sheriff's Office said air-sample tests from the abandoned car show that the trunk once held a decomposing human body.

The results of DNA samples sent to FBI forensics labs have not been made public.

Television stations said Sunday that Allen had gone further -- telling them lab results indicated the body in the trunk of the Anthony's white Pontiac was in fact Caylee Marie.

"We clearly have evidence that indicates that there was a dead body in the trunk of Casey's car, and that that body was Caylee," Allen told WFTV-Channel 9 in an interview that aired Sunday evening.