The family of a missing Orlando girl continues to be threatened every day as a search for the child continues.

"We get threats every day," missing child's grandmother Cindy Anthony said. "We get threats on our home phone and we get threats on our cell phone."

Missing Caylee Anthony's mother, Casey, canceled another scheduled Orange County Jail visit with her brother on Tuesday.

Casey Anthony's attorney, Jose Baez, said his client wants to talk with her family but is sacrificing for her daughter.

"It's not something she wants," Anthony's attorney Jose Baez said. "She wants to see her family. She wants to talk to her family but she's willing to sacrifice that for Caylee."

Casey Anthony's father, George, was the last family member to see her last Sunday.

Wednesday will mark one month since Casey Anthony was jailed in connection with the case.

Caylee Called?

Meanwhile, the grandmother of missing Caylee Anthony said she believes the missing girl may have made a call after she vanished -- which would be new information in the case.

"I believe my mother also heard Caylee during that time," Cindy Anthony said.

When Cindy Anthony was asked how Caylee would know her great-grandmother's phone number, she said the number was programmed into Casey Anthony's phone.

A sheriff's department representative is checking to see if Cindy Anthony has ever mentioned the call before.

Expert Discusses Liars

Family and friends have described Casey Anthony as a pathological liar -- a person who they claim has told one lie after the next, Local 6 reported.

Dr. Richard Hall, who is a forensic psychiatrist with patients who are both in and out of jail, said habitual liars often lie to feel good about themselves.

"It shows that I'm smarter than you are and it shows that I have some power over you," Hall said. "And it shows that I've got some power over you and that I can manipulate you."

Hall said people who lie often never come forward to tell the truth.

"People who are habitual liars continue to lie in captivity just like they lie in the general public," Hall said. "So, they tend not to change and suddenly want to tell the truth and get everything."

Hall said he can't comment specifically about the Caylee Anthony case but said it could take some time as investigators search for the truth.

Bond Motion Denied

On Monday, an appeals court has denied a motion to lower the bond for Casey Anthony.

The 5th District Court of Appeal in Daytona Beach denied Casey Anthony's motion for a rehearing. The motion was sealed.

"I still think that to this day, the bond is excessive and tantamount to no bond at all," Baez said.

Casey Anthony is being held on $500,000 bond on charges of child neglect, making false statements and obstructing an investigation. Police said she lied to them and didn't report her daughter, Caylee, missing for more than a month.

Grandparents Visit Detectives