re: Could you ever be forced into a confession?

That's why you envoke your right to remain silent. (5th Amendmant) and immediately request counsel. Under any and all circumstances, you never, and I repeat never, talk to the Police, especially if you know you're innocent and the cops are playing games. Most Cops are sociopaths, especially detectives who want a conviction and will stop at nothing to get one. Their main cause is to compile enough evidence against the person "they think" is guilty and let the court system handle the process from that point, moving forward. I don't know about you, but I'd have better results at a Craps table in Vegas than to trust my freedom with some dumbass, uneducated jury.

Are there innocent people behind bars because of some a-hole detective, that built enough "circumstantial" evidence against someone who decided to speak with them in the first place without adequate legal representation? There sure are, and facts to substantiate this.

Bottom line, if the cops wanted to speak with me about a crime I knew damn-well I wasn't a part of, I wouldn't speak with them and evoke my 5th Amendment right to remain silent. I would consult with an Attorney with the quickness.