In episode 5.13, "Rush to Judgment", Flack comes under heavy investigation when a suspect dies in his custody during an interrogation. His badge and gun are taken and he is demoted to desk duty and becomes what he calls "a member of the rubber gun squad" until the end of the episode, when his name is cleared. During the investigation, the team is shown to support him, with Stella Bonasera saying that "does everything by the book", and showing up to offer words of comfort to Flack while he's working. Also, Mac supports Flack throughout the episode, and at the end offers to take Flack out for a beer and to watch a hockey game, even though Mac doesn't like hockey himself.