Severide and Chicago P.D. help to build Boden's case of innocence for assault he did not commit.

Season 4 Episode 9 "Short and Fat"
Following Boden's arrest, Patterson is promoted to chief of Firehouse 51 much to everyone's dismay. Later on, Patterson sets new rules for the house that makes everyone uncomfortable, especially Chili and Borelli. Meanwhile, Severide continues to help strengthen Boden's case. Also, Dawson receives heat at a previous call when she had an outburst at a citizen and was recorded.