Sophia Bush's Erin Lindsay left Chicago P.D. after four seasons, and Bush was open about her decision to depart the hit show.

Sophia Bush Had a Memorable Run as Detective Erin Lindsay on 'Chicago P.D.' Sophia Bush describes Erin Lindsay as having "come from the street, so she already knows how all these people work." It ...

Per Page Six, all signs are pointing to her time on Chicago P.D. as Erin Lindsay. Bush left the show abruptly in 2017 after four seasons, alleging a toxic work environment.

Following her nine-year run on “One Tree Hill,” from 2003-2012, Bush starred on the NBC procedural “Chicago P.D.,” where she played Detective Erin Lindsay for 84 episodes, from 2014-2017.

Bush, 42, notably portrayed Erin Lindsay in “Chicago P.D.” from 2014 to 2017 — leaving after Season 4 due to its alleged toxic work environment.