ORLANDO, Fla. -- CSI teams spent four hours inside the home of a missing girl's grandparents looking for "anything and everything" that could help in the search for the child but little else is known about the visit.

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IMAGES: Missing Caylee Anthony Photos
IMAGES: Photos Of Casey Anthony Surface

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Detectives said the grandparents of missing Caylee Anthony, Cindy and George, allowed investigators to look wherever and take whatever they wanted at the residence.

A source told Local 6's Tiffany Tift that they hoped the search would give them new direction and they looked for "anything and everything" in the Anthony home.

Authorities said they are still classifying Caylee's disappearance as a missing person investigation.

"Right now we are still trying to determine what happened and trying to find Caylee," an investigator said.

Crime scene investigators were seen carrying in a sheet of black paper, a full tool box and empty evidence bags.

They were seen later rolling out a cart carrying a crate and paper bags.

Investigators would not say what was inside the bags. They only said they came to the house with a search warrant per proper protocol, Local 6 reported.

Dive Team Just Training

Several reports indicated that a dive team would be activated this week in Orange County possibly connected with the case.

However, the dive team is only training and it has nothing to do with the search for finding Caylee, Local 6 reported.

Family Not Surprised

Meanwhile, Cindy Anthony said she was not surprised when a CSI team showed up at her house Wednesday.

However, the family would not comment on the search.

Cans Taken For Prints

Earlier Wednesday, Local 6 reported that gas cans taken from a shed in the back yard of the home were stolen by Caylee's mother, Casey Anthony, 22, but were seized by detectives to check for other people's fingerprints, according Cindy Anthony.

"Plain and simple. She needed the cans because she ran out of gas. She had a faulty gas gauge. Simple as that," said Cindy Anthony.

The gas cans were stolen during the last week of June at a time when Caylee had reportedly been missing for several days.

"It's irrelevant to this case," Cindy Anthony said. "There's no reason to bring (the theft) up. Previously, (Casey) had used the gas cans. There's other people's fingerprints on them besides us, and that's what they're looking at."

In an interview with Fox News, Casey Anthony's father, George Anthony, said on the day of the theft, Casey did not want him to retrieve a tool from the trunk of her car.

"She was hesitant about letting me get in the car, and I said, 'Well, I've got an extra key, I'll just go get it.' She was adamant about that," George Anthony said.

"She didn't want him to know the gas cans were (in the trunk). She thought she could put them back and leave him a note of apology," Cindy Anthony said.

Cindy Anthony said her husband noticed nothing suspicious when he retrieved the gas cans from the trunk.

"There was no Caylee in the back of the car. There was nothing else in the back of the car except the normal stuff," Cindy Anthony said.

It is not known if there was gasoline in the gas cans when Casey Anthony's car was located at an Amscot. Her family said Casey Anthony ran out of gas and left the vehicle at the business.

Casey remains in the Orange County Jail on child neglect charges. She's expected to enter a written plea of not guilty Aug. 21, Local 6 News reported.

Family Of Possible Father Speaks Through Attorney

Also on Wednesday, the attorney for the parents of a man who has been mentioned as the possible father of Caylee held a news conference, saying the man's parents have never heard of nor have ever seen Casey Anthony.

Internet speculation that Jesus Ortiz, who was killed in a car accident in 2007, is Caylee's father recently entered the mainstream media, prompting his parents to speak.

"This is the first they were ever told that Caylee might be a grandchild of theirs," family attorney Bryan Crews said. "They became interested in that because that's all they would have left of their son, who died at age 20. This is a real surprise to them. I think another news station broke the story to them as a 'hello, big surprise' at their front door and that was a very shocking event for them. Since that time, they've gotten unwanted media attention."

The Ortiz family said it has no reason to believe that Jesus is Caylee's father.

Family Receives Threats

Meanwhile, Cindy Anthony said she has received the threats through e-mails, letters and phone calls.

The incidents have been forwarded to the authorities for investigation, Local 6 has learned.

A national search for Caylee, who turns 3 years old on Saturday, continues.

Watch Local 6 News for more on this story.