If you are ever arrested, it is our general recommendation to politely but firmly say, "I want to speak to an attorney. I do not want to answer any questions until I speak to an attorney." Repeat this to everyone who asks you any questions.
The police may say, "You'll feel better if you tell me about it"? While you might feel better for a moment, after several years in prison you won't think it was such a good idea to "get it off your chest".
Click for an article written by a criminal attorney on other things you should not do if arrested.