You’ve heard about the Miranda warnings, right?
You’ve seen them given on countless cop TV shows: “you have the right to remain silent, anything that you say can and will be used against you, you have the right to an attorney . . .” The thing is, the legal requirements for Miranda aren’t really what you see on TV. The law is basically this: the cops don’t need to give you Miranda warnings unless you are (1) in custody AND (2) subject to interrogation. Think, “custodial interrogation”. That’s why Miranda warnings aren’t required at an arrest—you’re in custody, that’s for sure, but you might not be subject to interrogation. If the police aren’t asking you questions, then you’re not being interrogated.
If you start offering up information spontaneously, that’s your own problem. No Miranda violation there. That’s why you should always keep your mouth shut. Trust me, folks get into a lot of trouble by just talking.