Casey Anthony's Mother Ordered to Testify About 911 Calls

ORLANDO, Fla. (CBS/WKMG) Casey Anthony's mother Cindy Anthony, whose frantic voice can be heard on 911 calls where she first reported her granddaughter Caylee missing, will have to testify in court, a Florida Judge ruled Friday.

PICTURES: Casey Anthony Personal PhotosPICTURES: Caylee Anthony: A Life Cut Short

Florida prosecutors have filed a motion asking to use the 911 calls to show that Cindy Anthony had suspicions about her daughter's involvement in Caylee's disappearance, and that Cindy Anthony possibly believed that Caylee was dead.

Casey Anthony's defense attorneys are trying to stop the use of the tapes, arguing that 911 calls are hearsay and therefore cannot be used in court.

On July 15, 2008, Cindy Anthony called 911 three times trying to locate her 2-year-old granddaughter, Caylee, CBS affiliate WKMG reported June 9.

In the second recording, Cindy Anthony exclaims, "There's something wrong. I found my daughter's car today and it smells like there's been a dead body in the damn car."

Cindy Anthony later claimed that smell came from a slice of rotten pizza, WKMG reported.

By the third call Cindy Anthony is crying and tells the dispatcher "I found out my granddaughter has been taken, she has been missing for a month. Her, her mother finally admitted that she's been missing," according to reports by the Orlando Sentinel.

Casey Anthony's daughter, Caylee, was reported missing in July 2008, a month after Casey claims to have last seen her daughter. Caylee's remains were found five months later in a wooded area near the Anthony family's east Orange County home.

The hearing on the 911 tapes is set to be held in mid July. Anthony has pleaded not guilty to murdering Caylee and her trial is set to start in May 2011.

Complete Coverage of Casey Anthony on Crimesider.