I knew a young guy (probably 19-20) who had $15K taken from him at a minor traffic stop close to here. He had the cash going to the big auto auction in Shreveport, Louisiana and was pulled over for speeding. The money was his savings and some his grandfather gave him to buy vehicles to start a used car business.
He had to spend about $5K of his own money to hire a lawyer and prove the money was his own and not acquired through criminal activity.