The teenager was killed, and her dismembered remains were found in Luzerne County, Bucks County District Attorney said during a news conference Thursday, Dec. 22, 2016, in Doylestown.
The girl was reported missing July 11 by her mother, Sara Packer, who filed the report with police in Abington Township, where the family had been residing.
Authorities did not divulge the manner of death, and declined to comment on why jurisdiction of the case has been taken over by Bucks County authorities, with Montgomery and Luzerne county law enforcement officials - along with Pennsylvania State Police and the FBI - continuing to participate in the ongoing investigation.
Packer's family has told police they believe she ran away from home and might have gone to Philadelphia or Allentown.
Prosecutors say the body of 14-year-old Grace Parker was found dismembered in a wooded area in northeastern Pennsylvania on October 31.
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Her mother, Sarah Packer, has been arrested and charged with obstruction and endangerment, and has been named a person of interest in Grace's death. She was being held as of Thursday in lieu of $200,000 bail, court records show.
"It was determined after comparing the dental remains with known missing persons reports entered into national missing persons databases that the identity of the remains was that of Grace Packer", Salavantis said. She has not been charged with her daughter's death. That would have been just before Grace Packer was reported missing. She allegedly did not provide police with vital information in the case.
Records show that between July 1, 2016 and November, 10 2016, while her daughter was reported missing, Sarah Packer spent more than $3,600 of disability funding intended for Grace.
Detectives are interested in speaking with anyone who saw or encountered Sara and Grace Packer - either individually, or together - at any time from June forward, particularly in public places and retail stores in the Abington and Quakertown locales. "Grace Packer was murdered and we will use all of our join investigative resources to bring Grace's killer to justice".
Anyone with information that could lead to Grace's killer is asked to contact Bucks County Detectives at 215-945-3100.