The Grand Inquisitor (2008)

A young woman (Dashe) discovers a cache of used books that she believes holds clues to the solution of decades-old crimes. When the authorities dismiss her, she takes matters into her own hands, ringing the doorbell of Hazel Reedy (Hunt), a lonely recluse who may or may not be the widow of America's most notorious serial killer. Their cross-generational confrontation, played out in real time, leads to an unexpected and shocking conclusion.