LS, Your respose is understandable. As a police officer you see the worst things possible, except of course what a soldier sees. Some of the "sheep" you refer to are these people.
Many police officers take the easy route and enforce the letter of the law, the difficult part is retaining your humanity and compassion for a father with an injured child. Unfortunately, doctors and law enforcement personel provide the most examples of people who trade compassion for professionalism.
If it was good police work it would not be so easily tossed out in court. As to your sheepdog referance, many sheep are well aware of the sheepdog's job of leading them to slaughter.
A good example is how Police consider everybody Civillians when in fact only Soldiers toss away their civil rights.
God forbid the officer merely reminded him of his error and instructed him to not drive until he's sobered up. Considering your average emergency room wait this shouldn't be a problem.