>No I think money laundering is when you knowingly mix proceeds of crime, obscuring it.

I can exempt myself from the $10k deposit/withdrawal/structuring rules at the bank by affirming to them that it's not the proceeds of a crime? If a cop decides to take the $300 out of my wallet, I just state "that's not drug money" and he has to give it back then and there?

Keep in mind that I can lose the money without a conviction, trial, or even being charged, so I don't think this has anything to do with it being the proceeds of a crime.