Investigators confirmed through DNA analysis that bones found at a landfill on Nov. 18 in Savannah, Georgia, belong to missing toddler Quinton Smith, the FBI's Atlanta field office said Monday. 

The 20-month-old boy was originally reported missing on the morning of Oct. 5 by his mother, 22-year-old Leilani Simon, who has since been arrested and charged with malice murder, concealing the death of another person, and other charges. 

Quinton Simon picture inset over five dumpsters where his remains may have been discarded

Little Quinton Simon went missing in Savannah, Georgia, Oct. 5 and his mother, Leilani Simon, was arrested for his death.  (Facebook/Mark Sims for Fox News Digital)

The little boy's remains were found on Nov. 18 following a 30-day search through the Superior Landfill, a process that authorities called "more grueling than anyone could have imagined." 

QUINTON SIMON'S MOM DOWNS SHOTS, FLIRTS WITH BAR STAFF AMID SEARCH FOR TODDLER'S REMAINS

During that search, investigators combed through 1.2 million pounds of trash in "grueling and hazardous" working conditions. 

Leilani Simon

Leilani Simon, 22, is charged with malice murder in her 20-month-old son's death.  (Chatham County Police Department)

Mother of Quinton Simon, Leilani Simon is photographed leaving her house on Wednesday, October 12, 2022.  (Mark Sims for Fox News Digital)

Leilani Simon was identified as a prime suspect early in the investigation and was arrested on Nov. 21. 

Her son was last seen in the early morning hours of Oct. 5 at a home in Savannah, where he lived with his mom, mom's boyfriend, maternal grandparents, and siblings. 

MISSING GEORGIA TODDLER QUINTON SIMON LIKELY DEAD; POLICE NAME MOTHER AS 'PRIME SUSPECT'

Leilani Simon told a police dispatcher later that morning that she awoke to find her son gone and believed someone had entered the room and taken him, according to local news outlet WCJL. 

Baby photos of Quinton Simon

A pair of baby photos of toddler Quinton Simon, whose remains were found in a Georgia landfill on Nov. 18.  (Chatham Police Department)

Law enforcement officers from the FBI, Chatham County Sheriff’s Office, Georgia Bureau of Investigation, Georgia Department of Natural resources, and other agencies assisted in the investigation and search for the toddler. 

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The Chatham County District Attorney is prosecuting Simon for murder and other charges. 

Fox News' Rebecca Rosenberg contributed to this report.