Nadia DeCotis in Chicago PD was a character introduced as a troubled young woman struggling with addiction and a difficult past. She formed a close bond with Detective Erin Lindsay, who helped her get sober and gave her a job in the Intelligence Unit, as well as hope to become a police officer someday. However, Nadia's story ended tragically in season 2, episode 20 ("Number of Rats"), when she was abducted by serial killer Dr. Gregory Yates. He drove her to New York City, where he raped, tortured, and murdered her. Nadia was found dead in the Bronx, which devastated Lindsay and deeply affected her character arc on the show. Nadia's death was a pivotal and emotional moment in the series, leading Lindsay into a spiral of guilt, addiction relapse, and self- destructive behavior. Despite her death, Nadia was posthumously recruited as a police officer by the CPD, honoring her memory and dreams. Her tragic fate also helped convict Yates, putting the serial killer behind bars. Yates later escaped prison and returned seeking revenge but was ultimately killed by Lindsay in self-defense. In summary, Nadia's character was killed off in a brutal storyline involving a serial killer, which had a lasting impact on the show and other characters, particularly Erin Lindsay.
