In 2015, a crossover event between Law & Order: Special Victims Unit and Chicago P.D. brought characters from both shows together. The storyline followed the teams as they teamed up to track down a serial killer, based on Ted Bundy, who resembled cases handled by Captain Olivia Benson 10 years ago. The crossover episodes showcased intense investigations and clashes between the SVU and CPD teams. There were potentially romantic moments between Benson and Voight, but the dark situation quickly changed the atmosphere.