If they want you, they got you no matter what you did or did not do, said or did not say. The best thing you can do for yourself is to say to them and just keep repeating over and over if your nervous. I have the right to remain silent and I want to talk to a lawyer. That's it. Once they've Mirandized and you are in cuffs,, SHUTUP! Zip it and refuse to answer any questions.