Read "The Innocent Man" by John Grisham. It's a non-fiction book by this lawyer and legislator who turned novelist.

You can even be induced to confess to a murder you didn't commit if you are not sharp in your dealings with these people.

Also, your YF should somehow be made aware that if he is ever approached about you, whatever they say you confessed to or someone else said about you is almost certainly a lie. Feeding false stories is a major tactic, intended to extract confessions but in reality often just pressuring for conforming false statements motivated by cognitive dissonance, something that works especially well with kids.