Jacob Sullivan, 44, was arrested by Bucks County detectives and formally charged with rape and murder on Sunday morning over the death of Grace Packer, whose dismembered body was found by hunters last October, in a forest two hours Philadelphia.
Similar charges have also been filed against Sara Packer, 41, the girl’s adoptive mother, Reuters said.
Court documents claim the couple began plotting to kill the girl in the autumn of 2015. Mr Sullivan told detectives that he and Sara Packer drove Grace to their new home in Quakertown on July 8, 2016.
Once inside, Mr Sullivan allegedly struck the teenager in the face and then raped her in the attic as her adopted mother watched. Mr Sullivan allegedly told detectives he had raped Grace previously that the girls’ adopted mother enjoyed watching.