ORANGE COUNTY, Fla. -- It has been one month since Caylee Anthony was reported missing in Orange County. Investigators held a news conference on Wednesday afternoon to shed new light on recent theories from the little girl's grandparents about what happened to her.

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The Orange County Sheriff's Office said it's not trying to build a case against Caylee Anthony's mother Casey, it's trying to get truthful information from her about where her daughter was before she disappeared.

"Before you even get started, jump day, you had a month expire. It makes it awful tough to re-track information," said Chief Mark Strobridge of the Orange County Sheriff’s Office.

Caylee's grandparents made statements about mystery kidnappers, but investigators have not identified any kidnappers.

"It is our hope and prayer that Caylee is found alive and well," Stobridge said.

The Orange County Sheriff said it's working with analysts from the Florida Department of Law Enforcement and FBI agents not just here in Orlando, but around the country. They have detectives from all departments following nearly 1,500 leads.

Investigators said they have everything they need to do a large scale search except one thing, a location where they can find Caylee Anthony.

"What we don't have is information on exactly where Caylee was last. The one person who has that information is Casey Anthony and she is not providing information that's accurate to us," Stobridge said.

Investigators said they also called the news conference to say they will only release information as necessary to help find Caylee, and they wouldn't lend any credibility to some of the off-the-wall claims the family's been making.

"You would think the people who have my granddaughter would be smart enough to say, ' Listen, I'm going to turn the girl back in to her family,'" George Anthony told Eyewitness News in an interview earlier in the week.

Detectives have said in court that there is evidence that Caylee may not be alive, including the smell of death in her mother's car.

Caylee's grandparents are expected to visit her mother in jail on Thursday. It would be the first time she has seen any family members in nearly two weeks. Eyewitness News learned Thursday morning that Casey had apparently accepted the scheduled visit.

DETAILS EMERGE ABOUT CASEY ANTHONY'S CALLS

Eyewitness News learned Wednesday there's a more detailed record of some of Casey Anthony's calls made before Caylee was reported missing. The leaked phone records show that on Monday, June 16 Casey Anthony called her parents six times in just over an hour. The records show exactly whom she called and what time the calls were made.

According to the leaked records, Casey made six calls to her parents on the afternoon of June 16, with the first call at 3:03pm to her father's cell phone and the last of the six made to her mom's cell phone at 4:24. During that time she also tried her mother at work and called her ex-fiancé, Jesse Grund.

The next day, June 17, neighbors told investigators that Casey borrowed a shovel from them. Then, on June 18, there was another spike in calls to her parents, six in 45 minutes during the early part of the afternoon. According to the leaked records, three calls were made to her parent's home phone, two to her mom's cell phone and one to her dad's cell phone, all between 12:33pm and 1:11pm.

VOLUNTEERS USE MESSAGE BOARD TO ORGANIZE SEARCH

A small group of volunteers used WFTV.com's message board to organize a search for Caylee Anthony. The volunteers were searching in Blanchard Park on the Econ Trail again Wednesday.

The volunteers were also at the park Tuesday and searched through wooded areas and under bridges along the trail. It's the same park where jogger Nicole Ganguzza was attacked and killed in June.