The defence has called its first witness - forensic anthropologist Professor Susan Black.
She tells the court she couldn't age the fragments recovered from the fireplace and sink traps, and couldn't confirm whether they are human or non-human.
The parents of murdered April Jones fear that killer Mark Bridger may never reveal where the body of their daughter is.
ITV News correspondent Carole Green has covered the month-long trial of Mark Bridger at Mold Crown Court. Here she gives her personal view.
The disappearance of April Jones prompted the biggest search of its kind in British policing history.