Sophia Bush
The latter woman came under investigation by the Internal Affairs Division, and she was on a path to her police career ending, but a job offer from the FBI saved her from going full through that process. Interest in her becoming a federal agent had been expressed earlier, but her boss and mentor Hank Voight (Jason Beghe) stepped in to help get her the opportunity at that time.
Leaving Chicago for New York and the FBI position also meant Lindsay breaking things off with her professional partner Jay Halstead (Jesse Lee Soffer), with whom she was involved romantically. She also left town when her mother (who was played by the late Markie Post) was a murder suspect, and Voight knew that Lindsay going elsewhere would spare her much of the pain of enduring that situation.
Bush later returned to series work in the Hulu drama “Love, Victor” and the CBS medical show “Good Sam.” She also produced the latter program, and a notable episode reunited her with her former “One Tree Hill” co-stars Hilarie Burton Morgan and Bethany Joy Lenz, with whom she also does the podcast “Drama Queens.”