Only problem I have is that I don't have a "hide a key" tucked anywhere in my car. I like the idea though, especially making it look like you accidentally locked them in.
I have considered getting a voice recorder for this very reason. I say that I did not give consent, the cop does, who wins.........
My daddy always said there are three sides to every story. Your point of view, his point of view, and the way it actually happened. Yet still LEO can say what they want in a court of law and it will almost always be taken as God's honest truth.
Either way, no matter what, don't talk to cops.
Below is a GREAT two part video series. It is LONG, but very informative and something everyone should see.....
my 2 cents.