“Common red flags for passengers are ‘traveling to or from a known source city for drug trafficking, purchasing a ticket within 24 hours of travel, purchasing a ticket for a long flight with an immediate return, purchasing a one-way ticket, and traveling without checked luggage.’ DEA agents then detain and question travelers with large amounts of cash, and, if they determine the money is linked to drug activity, seize it, even if there is no hard evidence that it is connected to illegal activity. As the Inspector General notes, these agents ‘rely on their immediate, on-the-spot judgment.’ The passenger is then released, bereft of money but otherwise free to go.”
Read more: https://reason.com/blog/2017/03/29/the-dea-seized-4-billion-from-people-sin