The Supreme Court has already ruled that the police can lie to you. Was that a good ruling? I dunno. But I suppose the police think forged documents are just another form of lying.
Anyway, here are two handy steps to remember when being interrogated by the police.
Step 1: Say “I want a lawyer.” Say nothing else.
Step 2: Go back and repeat Step 1.
And here’s a good video on the topic. The narrator (a law professor) explains how you can get in trouble talking to the police even when you’re both innocent and 100% truthful.
Here’s what else you can to the cops: “I got nothing to say.”