Have you ever watched 48 hours? the detectives are always saying "this is your only chance to come clean and for us to help you" then they spill their guts hoping for their help, instead, they just handed the detectives their case on a silver platter. Watch that show, its a perfect example on what NOT to do.. I think i've only seen one or two people keep their mouths shut. and one of them totally walked.(even though they pretty much knew he did it, just couldn't prove it)