...but now it's up to you to, um, not be so silent and explicitly invoke that right if you get arrested.

From the AP:

The Supreme Court ruled Tuesday that suspects must explicitly tell police they want to be silent to invoke Miranda protections during criminal interrogations, a decision one dissenting justice said turns defendants' rights "upside down."

A right to remain silent and a right to a lawyer are the first of the Miranda rights warnings, which police recite to suspects during arrests and interrogations. But the justices said in a 5-4 decision that suspects must tell police they are going to remain silent to stop an interrogation, just as they must tell police that they want a lawyer.

The ruling comes in a case where a suspect, Van Chester Thompkins, remained mostly silent for a three-hour police interrogation before implicating himself in a Jan. 10, 2000, murder in Southfield, Mich. He appealed his conviction, saying that he invoked his Miranda right to remain silent by remaining silent.

Justice Sonia Sotomayor, the court's newest member, wrote a strongly worded dissent for the court's liberals, saying the majority's decision "turns Miranda upside down."