Lots of people say "don't talk to the police--they'll take things out of context"; that is, they'll NTL about the conversation (and substantively lie about their interpretation). Some people say "don't talk to the police--they'll fabricate an incriminating remark." But such people never say that the police will fabricate a conversation. Is there some magic line that the police won't cross that tells us more about how most people operate than the concept of NTL in this post?

(an alternate explanation is that police don't fabricate incriminating remarks; they just take things out of context and the victim lies about having stumbled into the trap; the person recounting the story doesn't want to accuse the victim, an ally, of lying, so he accuses the police.)