Correct me if I'm wrong, but it is my understanding that the guy already HAD the right to remain silent. And that the reading of his rights merely recapitulates this fact. Yes? No? If yes, what's the big squawk? And if no, shouldn't we all go get Mirandized right away? Honk honk.
Update: As per Larry Kurtz's prompt, I offer this overview of Miranda rights from an online source. It appears to run counter to his assertion that police are not required to read you your rights. I hope he sees fit to clarify.