Law & Order: Trial by Jury S01E03 - Vigilante

Assistant District Attorneys Kibre and Gaffney face the unpopular job of prosecuting a father accused of murdering a paroled child molester who had approached his daughter. The case takes on an added twist when they investigate why his self-appointed lawyer is so passionate about representing him. Later, new evidence about the pedophile's intentions is uncovered and District Attorney Branch knows the unwelcome publicity fallout for his department could hurt his chance at reelection.