In ways that I have seldom seen in other titles, Manhunter addresses the uncomfortable questions of "super-vigilanteism" versus standard justice.
By day, as a prosecutor she works to deprive criminals of the freedom and possibly their lives.
By night, as a vigilante she works to deprive criminals of their freedom and possibly their lives.
But she knows that there's a difference and it bothers her greatly; good for her. She really needs to meet Two-Face some day.