This is covered in basic military and I guess also police training where I grew up. I only have brief military experience (draft) and yet I know very well that

This is covered in basic military and I guess also police training where I grew up. I only have brief military experience (draft) and yet I know very well that anyone in your custody are to be treated well or you get in trouble. Besides, staying professional is the right thing to do and police of all should be extremely concerned with doing the right thing IMO.