Grandma breaks down testifying in Anthony trial

By KYLE HIGHTOWER | May 31, 2011 | 12:14 PM EDT

A tear rolls down the cheek of Casey Anthony during a recess after her mother Cindy Anthony testified during her murder trial at the Orange County Courthouse, in Orlando, Fla., Saturday, May 28, 2011. Casey Anthony is charged with the death of her daughter, Caylee. (AP Photo/Joe Burbank, Pool)

ORLANDO, Fla. (AP) — The mother of a Florida woman charged with murdering her toddler broke down in tears on the witness stand as prosecutors played a 911 tape in which she reported her granddaughter missing.

Cindy Anthony leaned forward with her face in her hands and sobbed Tuesday as the 911 tape from July 2008 was played for jurors on the sixth day of testimony in the murder trial of her 25-year-old daughter, Casey Anthony. During the 911 call, Cindy Anthony said her daughter had just told her that her 2-year-old granddaughter, Caylee, had been missing for 31 days.

Casey Anthony is charged with first-degree murder and could be sentenced to death if convicted. Defense attorneys say Caylee died in an accidental drowning in the family's swimming pool.