UPTON DIVES INTO A PAST CASE

Upton becomes consumed with a decades-old missing person’s case linked to Petrovic after a young child shows up at the district seeking help.

Air Date: Wednesday, May 1 (10-11 p.m. ET) on NBC.

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CHICAGO P.D. -- "Buried Pieces" Episode 110010 -- Pictured: Tracy Spiridakos as Hailey Upton -- (Photo by: Lori Allen/NBC)