How "good" cops end up doing "bad" things to protect their careers.

Officers Nolan and Lopez pursue a suspect into a wedding , creating a chaotic and public scene. [S1E4] Crossing the Line

Gates becomes deeper embroiled in a cover-up involving a hit-and-run and a kidnapping, realizing he is being framed by his mistress and a criminal gang. How "good" cops end up doing "bad" things