ORLANDO, Fla. -- FBI agents are now checking into some of the daily threats targeting the family of a missing Orlando girl as a national search for the child continues.
"The sheriff's department (and) the FBI are looking into this," missing Caylee Anthony's grandfather, George, said. "Whenever you start threatening people with bodily harm, that's a problem.
The Anthony family said they have received threats every day by letter, e-mail or phone.
Caylee's mother, Casey Anthony, remains jailed on $500,000 bond.
Family Upset About 'Leaks'
Detectives continue to focus on three days in June that may be critical to finding the truth, Sheriff's office sources told Local 6.
Investigators are honing on June 16 as a time when something may have happened to Caylee.
On June 17, Caylee's mother, Casey, asked a neighbor to borrow a shovel and on June 18 a neighbor reported seeing Casey Anthony back a car up to the garage of the family's home.
It is something she did not normally do, Local 6 has learned.
Casey Anthony also apparently made a flurry of phone calls on June 17 and 18.
George Anthony was not happy about the timeline leak, fearing it could convince the public that Caylee is dead, Local 6's Tiffany Tift said.
"If that is what they want to do, that is fine," George Anthony said. "It is just a shame, you would think that in any type of investigation, no matter what is going on, you'd think certain things are going to be withheld. Finding my granddaughter -- that's what the whole thing is supposed to be for."
Billboard Moving Around State
George Anthony also said he will be driving a mobile billboard around Florida featuring his missing granddaughter
Anthony said he plans to go to Gainesville, Jacksonville and possibly even the Keys this week.
George Anthony said since he lost his job, driving a mobile billboard will be his full time job.
A national search for Caylee continues.
Watch Local 6 News for more on this developing story.
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