Diane's father is shot to death and her brother claims responsibility. However, Diane later finds out that her mother was the one who did it. Bobby investigates the story while Andy keeps a devastated Diane from drinking, and they learn the truth about what really happened. ADA Leo Cohen makes his debut by insulting Bobby and nearly getting punched for it. Greg needs a new place to stay and enjoys the chance to look at new neighborhoods while he and Andy check out an abused wife's claims that her husband killed a kid nine years earlier. They learn the victim wasn't a person of virtue and manage to stop another killing in the nick of time.