Details of Disappearance
Corey was last seen at the residence he shared with his mother, Debbie S. Derr, on Second Street in New Columbia, Pennsylvania on October 12, 1986. They lived with Corey's sister; a roommate, Alberta Sones; and Sones's two young children. Derr left Corey asleep in her upstairs bedroom while she went to a nearby convenience store for a pizza at approximately 12:10 a.m. Corey's sister, Sones, and Sones's children at the residence at the time; Sones was awake and watching television. Derr returned at approximately 12:40 a.m. and discovered that her son had disappeared and the door was open. Sones told authorities that she didn't see Corey leave the house or anyone enter the house while his mother was away, and never heard any strange noises. The child has never been seen again.
At the time of Corey's disappearance, his parents were divorced. Authorities confirmed that Derr did go to the convenience store during the time she said, and Sones passed a polygraph test, as did several other people close to Corey's family. Neither of Corey's parents is a suspect in his disappearance. Several ransom calls were made to different members of Corey's family after he went missing; his grandmother claimed she got a ransom call from a woman as late as January 1991. The caller(s) were never identified.
Authorities believe Corey may have been abducted by a non-family member. His case remains unsolved.