That police officer is known to be humane in his approach.

Humane : having or showing compassion or benevolence.
Unsympathetic : not feeling, showing, or expressing sympathy.
Uncultured : not characterized by good taste, manners, or education.
Uncompromising : showing an unwillingness to make concessions to others, especially by changing one's ways or opinions.
Uncivilised : (of a place or people) not socially, culturally, or morally advanced.

Antonym of Humane is Unsympathetic