Around 3 in the morning on January 7, 2009, a 22-year-old college student named Anthony Smelley was pulled over on Interstate 70 in Putnam County, Indiana. He and two friends were en route from Detroit to visit Smelley’s aunt in St. Louis. Smelley, who had recently received a $50,000 settlement from a car accident, was carrying around $17,500 in cash, according to later court documents. He claims he was bringing the money to buy a new car for his aunt. [snip] But a subsequent hand search of the car turned up nothing except an empty glass pipe containing no drug...