A cop is murdered and suspicion falls on someone who has been holding a grudge against the officer.
Intelligence works hard to solve the case but Dep.
Supt. Samantha Miller is hesitant to defend him until she knows the whole story.
Air Date: Wednesday, January 27 (10-11 p.m. ET) on NBC.
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CHICAGO P.D. -- "Unforgiven" Episode 804 -- Pictured: (l-r) Marina Squerciati as Kim Burgess, Jesse Lee Soffer as Jay Halstead, Jason Beghe as Hank Voight, LaRoyce Hawkins as Kevin Atwater -- (Photo by: Matt Dinerstein/NBC)
