Hank: The same serial killer was active a few years ago. And that email from Det. Leo Hernandez proves that the CPD knew about it and covered it up under orders of Brian Kelton. Katherine Bradley: As in the next Mayor of Chicago, Brian Kelton? Hank: Four women were killed after that email was sent. They'd still be alive today. Those bodies are on Kelton.
Antonio: Hank, enough's enough. This thing is on me. Hank: Antonio... Antonio: I'm the one that needs to tell the truth. Ruzek: You know you can't do that, Antonio. Antonio: I'm the one who killed a guy. Ruzek: Yeah, I know, we're the ones who covered it up for you.