The grandmother of Quinton Simon, the 20-month-old whose remains were found in a Georgia landfill following his October disappearance, was arrested Monday. 

Billie Jo Betterton, who also goes by the last name Howell, was booked into the Chatham County Detention Center and is on hold for the juvenile court system, according to jail records. 

QUINTON SIMON: FBI INITIALLY FOCUSED ON SPECIFIC DUMPSTERS FOR MISSING TODDLER'S REMAINS

Quinton Simon with his grandmother, Billie Jo Betterton, who also goes by the last name Howell, who had custody of him when he vanished. Btterton was arrested Monday and is on hold for the juvenile court system. (Facebook)

Betterton's daughter, Leilani Simon, 22, was arrested in November for murder after police found Quinton Simon's remains in a Savannah landfill. She reported her son missing on Oct. 5 and days later she was named the prime suspect in his disappearance and death. 

Billie Jo Betterton, who also goes by the last name Howell, was arrested Monday and is on hold for the juvenile court system. (Chatham County Detention Center)

She said she awoke and believed someone had entered her home to take her son. She is charged with murder, concealing the death of another and falsely reporting a crime, records show.

Betterton had custody of Simon when he vanished. 

Leilani Simon, 22, (right) was charged her son Quinton's murder Nov. 21 nearly two months after she reported him missing. (Facebook/ Chatham County Detention Center)

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Authorities had spent 30 days combing through 1.2 million pounds of trash before locating the remains. 

WHD News' Rebecca Rosenberg contributed to this report.