When an ex-convict is arrested for a series of rapes, Sam uses a new lab technique for bite marks (forensic dentistry or odontology) that he's developed which casts reasonable doubt on the defendant's guilt. After his technique gets that man acquitted and released, an identical fatal rape in the same neighborhood occurs causing others, including Sam himself, to blame him for the later crime. But Sam keeps investigating, just like Quincy always does.
—Malia Kapalena