It is a genuinely open question whether an American police officer can do almost anything without suffering criminal consequences. Americans have a profoundly stupid and misguided deferential attitude toward law enforcement, one which presumes that police officers—fallible, often incompetent, and frequently temperamental human beings—are worthy of some sort of extra-special benefit of the doubt about their professional behavior. American citizens have no problem suing doctors for their back molars on the flimsiest of pretexts, but we generally cannot bring ourselves to convict police...