We recently discussed how to protect your right to remain silent if cops try to talk to you without an attorney present. But suppose you didn't realize what was happening until it was too late. Or maybe you felt physically threatened or emotionally manipulated into saying what a cop wanted to hear. Now you're worried that the cop tricked you into saying something incriminating.
You thought it wouldn't hurt to tell the cop your side of the story--after all, you have nothing to hide. Being at a party where someone was assaulted doesn't make you a criminal. And anyway, what were you supposed to do--step in and help? So the cops found heroin there, too. You didn't have any on you. And you got out of there before they could ask any questions.