OKLAHOMA CITY - An autopsy is offering new clues in the death of a teenage girl, whose body was found in a landfill months ago.
Landfill employees found the remains of Geanna Durham, 13, in a trunk in February and called police.
An autopsy obtained by NewsChannel 4 Thursday lists the manner of death as "unknown" and the cause of death as "undetermined."
The Medical Examiner believes Geanna had been dead for "a minimum of several months and likely longer," according to the autopsy.
Investigators think the girl died in May 2014 and her mother, Reshawnda Durham, hid the body in her home.
About a year later, investigators believe Reshawnda moved her daughter's body to a storage facility in Del City owned by Walter Ray Pelfrey.
The Attorney General charged Reshawnda with failure to report discovered remains and one count of unauthorized removal of a dead body.
She was already facing three counts of child neglect.
He charged Pelfrey with one count of accessory after the fact and another count of unlawful removal of a body.
Neither is charged with murder, and death investigators tell NewsChannel 4 the state of the girl's remains make proving it more difficult.
Former prosecutors, though, said it's not impossible.
According to an autopsy, there is no evidence of antemortem or perimortem injuries.
Examiners did find "evidence of damage from heavy equipment" to the body and the trunk that held it.
Inside the trunk, the Medical Examiner also found "thin-walled metal tubing, [a] small bottle of correction ink, [a] small pencil sharpener, [a] rectangular piece of clear molded plastic, [a] McDonalds food wrapper, [a] fragment of one dollar bill and numerous staples," according to the autopsy.
Death investigators tell NewsChannel 4 figuring out how the girl died is more likely to come from witnesses and the items and evidence on the suitcase instead of details in the autopsy report.
The police said they are still investigating.