[seethishat]

It is illegal to lie to a police officer in the US. It's better to remain silent than to tell a lie. Giving a false PIN is a lie. And that by itself is a crime.

I'm not taking sides here, I just wanted to make that clear.

And you should understand that they can lie to you. That's OK and legal, but you cannot lie to them.

[EPWN3D]

There are limits to the lies they can tell, IIRC. They are limited to lies which would not harm an innocent person. So if an officer says "We have your fingerprints on the murder weapon", that is fine, because an innocent person will know that there is no way that can be true. Whereas a guilty person would presumably find that lie plausible.

But if an officer gets a confession by saying, "They just passed an amendment, and you don't have the right to a lawyer anymore, so you have to answer my question or I'll send you to a torture dungeon", that is a lie that can harm anyone, regardless of guilt.