'Chicago PD': Sophia Bush protects and serves in new clip
When she was cast, Erin was described as "a member of the CPD investigative team who has an 'unexpected past.'" In this video, courtesy of PopSugar, fans can see Bush's softer side as Erin and also how she's a competent cop.
"Chicago PD" premieres on NBC on Jan. 8 at 10 p.m. The series also stars Patrick Flueger, Jon Seda, Jesse Lee Soffer and Jason Beghe.