Blind police justice and right livelihood The police seem necessary for any defiled society; but that doesn't mean being a police officer, who must follow laws objectively but also blindly, is necessarily right livelihood.

They are encouraged in the US to use violence, depending on what the laws say not what their hearts say, and are allowed to lie to make the job easier. What do the suttas say? What does your heart say?
this comes to me, im not 100% sure if my memories correct.  One time, Lady Visaka (or other rich merchant in savatthi) was upset (or even crying) that king Pasendikosala denied her something.   Buddha said to be under someone's authority is suffering, but being under the authority of sensual desires is much worst.  When I get bullied (by bosses or any authority figures), my heart would think of this.   

As far as view from authority figures, they have options not to break precepts.