Law & Order: Special Victims Unit (1999) : 24x21

Benson and Carisi are baffled when a series of assaults have the same M.O. but different DNA at each crime scene. Muncy believes Elias Olsen has struck again and is determined to prove it. The crossover continues on Law & Order: Organized Crime S03E21 Shadowërk (II), Law & Order: Special Victims Unit S24E22 All Pain Is One Malady (III), and Law & Order: Organized Crime S03E22 With Many Names (IV).