Orlando, Florida (CNN) -- Prosecutors can play tapes of 911 calls made by Florida murder suspect Casey Anthony's mother after she learned her granddaughter was missing, a judge ruled Thursday. Anthony's mother, Cindy Anthony, admitted during a hearing Thursday in Orlando that she had made exaggerated accusations about her daughter in those calls in a bid to get police to her home. But Circuit Judge Belvin Perry ruled that Cindy Anthony was trying to use calls to police as a "ploy" to get her daughter to tell her what she knew about the missing 2-year-old Caylee Anthony. Defense lawyers sought to have thrown out of court as hearsay, but Perry found the tapes were not being used to prove the facts of the case.
@highlight
NEW: A Florida judge has allowed the 911 tapes to stay in evidence
@highlight
Mother: I didn't want police thinking I was "some crazy grandmother"
@highlight
The defense argues that taped phone calls are hearsay and should not be admitted
@highlight
Prosecutors say calls are critical to their case against Anthony
Casey Anthony
Cindy Anthony
Cindy Anthony
Caylee Anthony
@placeholder threatened to call the police, hoping it would force Casey Anthony to say where her daughter was.
Casey Anthony
Cindy Anthony
Cindy Anthony
Caylee Anthony
The third and final call was placed immediately after @placeholder overheard what Casey Anthony told her brother.
Casey Anthony
Cindy Anthony
Cindy Anthony
Caylee Anthony
@placeholder has since said that the odor emanating from the car could have been from rotting garbage.