Laniyah Whitted's family last saw her when she was dropped off at Cape Fear High School on Nov. 16, 2021.
James Dunmore pleaded guilty to one count of voluntary manslaughter and guilty to one count of failure to notify of a death.
Jonathan Gerlach was arrested Jan. 6 at the cemetery with a bag containing human remains of children and skulls, along with additional bones in his vehicle.
The remains have been positively identified as a man who had been missing since July 2024.
The singer D4vd is considered a suspect in the death investigation of 15-year-old Celeste Rivas, a source told ABC News.
Officers responded about 1:30 p.m. to a wooded area along the 500 block of S. King Street and found the remains.