Chuck Palahniuk. Ghosts (№ 379)

The police officer is obliged to sacrifice his life for almost anyone.
For the flayers.
For drug addicts. For the Communists. For Lutherans.
In the line of duty, you die for rich kids with a huge inheritance.
For child molesters. For the pornographers. For the prostitutes.
If the next shot fate has prepared for you.