There's really not much point to this thread. You don't need to scour the games for proof that Sam and Max solve cases in an unconventional (and often criminal) manner. Their every adventure is full of such events. There's no challenge to this. If you want a better challenge, try to make a list that proves Sam & Max are /good/ police, citing examples where they conducted in a manner as would be fitting for a law-abiding law official. You'll find that more difficult.
p.s. You can't fire a freelance employee, because freelancers aren't on your payroll. They're employed on a case by case basis which is what makes them freelance. So the commissioner can't 'fire' them. He can only stop sending them cases.
Of course, the real world has no such thing as freelance police, which is what makes the world of Sam and Max so entertaining. And I suspect its also the reason that the commissioner keeps hiring them. There's no other freelance police he can call