Both parents have been charged with felony concealment of death.
Best was arrested on September 15, and released on $10k bond. Billington meanwhile turned herself in to High Point Police Department on October 1; her bail was set at $50k.
Police say they have both been cooperating with the investigation.
"Our thoughts and prayers are with those affected," a university spokesperson said. "While the High Point Police Department oversees the investigation, the university continues to provide health, safety and support services on campus to all students."