KRDOBy Jamiel Lynch, CNNRemains found Friday in a landfill are believed to be those of 20-month-old Quinton Simon, who was reported missing in October from his Savannah home by his mother.Quinton’s mother, Leilani Simon, has been the sole suspect in this case, said Chatham County Police Chief Jeffrey Hadley in a news conference. She was arrested Monday and is being held on charges of malice murder, concealing a death, and false reporting/making fals…