ORANGE COUNTY, Fla. -- People began gathering in the cool, predawn hours to take part in what organizers hoped would be a massive search for little Caylee Anthony's body.

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RAW AUDIO: George Questioned By Investigators
VIDEO REPORT: Search May Be Largest Ever
CINDY TALKS: Disputes Death | Fighting Websites
ARCHIVE: Read Previous Reports On Anthony Case

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Officials of the Texas-based search group EquuSearch estimated earlier in the week they would draw as many as 5,000 volunteers to comb through woods and swampland to look for skeletal remains of the child. However, as of the 8:00 a.m. start time, only about 500 had showed up.

Sandra Jensen was one.

"We need help find Caylee," she said. "To find that little girl. She's been gone way to long."

The two-year-old was reported missing by her mother, Casey Anthony, over the summer. But Casey didn't call sheriff's deputies for at least a month after she said her child first disappeared. Casey has since been charged with murder in connection with the case.

Search teams will focus on four places in east Orange County: Jay Blanchard Park, Moss Park, the woods near the home of Casey's parents, George and Cindy, and an area of land near the Orlando International Airport. They're searching those spots based on eyewitness reports and cell tower triangulations that show where Casey Anthony was around the time Caylee disappeared.

If Caylee's body is not found by Tuesday, EquuSearch said it will decide whether to come back again. It said it has searched as many as seven times for one victim and it's successful about a third of the time, having found 300 victims so far.

"The weather's right, the water's down, the vegetation's down. We have the right equipment. With a little bit of luck, we'll be able to find Caylee and bring closure to this community," said EquuSearch founder Tim Miller.

The command post is near the corner of Judge Road and Shadowridge Drive (see map), almost directly north of Orlando International Airport. The search is set to begin at 8:00am Saturday and they are expecting as many as 5,000 people. If you want to be one of them, you can show up Saturday morning at the command post.

AUDIO RELEASED OF GEORGE ANTHONY INTERVIEW

Late Friday afternoon, Eyewitness News obtained new audio tapes of interviews with George Anthony. They indicate he feared the worst when Caylee disappeared.

"My, my heart is killing me right now to say it's going into my granddaughter is not, no longer alive," he said (listen to full interview).

He also said, if he lost his granddaughter, he'd probably lose Casey, too.

Those tapes and documents show that George Anthony told investigators he felt something was wrong from the very beginning. The documents focus a lot on interviews George and Cindy Anthony did with sheriff's deputies.

When sheriff's investigators questioned George nine days after Caylee was reported missing, George told them he had "bad vibes" the very first day he got his car back and smelled a rancid smell in the trunk, a smell, he said as a former law enforcement officer, he knows and would never forget. The smell was that of a dead body.

Casey's father George told investigators, "I don't want to believe that I have, have raised someone and brought someone in this world that could do something to another person. I don't want to believe that."

George also told them, "I, I, I believe that there's someone dead back there and I hate to say the word human. Um, I hate to say that."

George told them, when he opened the trunk of the car, he said to himself, "Please don't let this be my Caylee."

But Thursday, Cindy Anthony told Eyewitness News she's holding on to hope.

"No one's brought me a body. No one's proven that she's dead. I'm not gonna give up on someone that I love that easy. And if I did, then what kind of person would I be? I'm not that person," she said (full interview).

But George also told sheriff's investigators that the very first night they found out Caylee was missing, Cindy told him, "We lost her. We lost her." When he asked who, she said "Caylee."

George also told investigators his daughter Casey lives on the edge, that she takes things as far as she can take them and then she piles on more. He said they caught her in lies about work and money and said she's really good with computers.

Casey spent the Tuesday through Saturday around the 4th of July with Amy Huizenga, her former best friend. She told Amy that Caylee was at the beach with the nanny and with Cindy, but no one's met the nanny.

George says Casey has lied to her attorney, Jose Baez. She told him she had $5,000, even though she didn't and then she told him that he'd get the rest after she gets out of the situation.