ORLANDO, Fla. -- Volunteer divers searching an Orlando river for the remains of 3-year-old Caylee Anthony on Thursday said they discovered a garbage bag that was held down by bricks and contained what appeared to be bones and toys. But after visiting the site, a lead Orange County Sheriff's Office investigator said this is not a crime scene.

LIVE: WKMG-TV Coverage Of River Search

The dive search was led by celebrity bounty hunter Leonard Padilla. It was not immediately known if the bones are human.

"There's a couple of small toys in the bag. One of them is a clover-type shaped item -- green -- and we know that Casey was big on clover-shaped items. So I told them to shut it down and get the sheriff's office out here," Padilla said.

A lead county investigator and FBI agent visited the scene, but left saying would not calling sheriff's office dive team to the area.

"We came out here to find Caylee, but you don't want to find her," Padilla said while crying. "But that's the truth of the matter. We think we have."

Padilla said he has believed for a while that Casey Anthony left her daughter's body at Blanchard Park.

"When the detectives talked to her, while she was trying to convince them (baby sitter) Zenaida (Gonzalez) took (Caylee) away at the Sawgrass Apartments, she also mentioned that she had also come out here to see -- that afternoon at 5 or 6 -- if possibly Zenaida was out here at the park because Zenaida used to bring the girl to the swings," Padilla said. "When we got into town and bailed her out, the day after she was out she told me that Zenaida had taken (Caylee) away from her right here in front of the swings at Jay Blanchard Park."

Padilla said Casey Anthony mentioned the name Zenaida and the park about eight times.

Caylee, 3, was last seen in mid-June but was not reported missing until mid-July. Her mother, Casey Anthony, 22, remains jailed on first-degree murder charges in her daughter's disappearance.