The Rules: Post info about ONE Supreme Court decision, modern or historic, to your lj. (Any decision, as long as it's not Roe v. Wade.) For those who see this on your f-list, take the meme to your OWN lj to spread the fun.
You've heard this dialogue before, on any cop show. If it occurs twenty minutes in, they've got the wrong guy. If it happens at the forty-five minute mark, they have their dude: "[Suspect's name here], you have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to have an attorney present during questioning. If you cannot afford an attorney, one will be appointed for you. Do you understand these rights?"
If you are arrested in the United States, the cops must tell you this piece of information before they question you, and they must abide by the promises made therein. If they do not tell you and question you anyway, or if they do not keep the promises, your case can be thrown out of court. And they have to make sure you understand. There's an English verb specifically for making this speech: "to Mirandize."
The right to meaningful protection from self-incrimination in this kind of emergency situation was brought to you by a 1966 case called Miranda vs. Arizona.