Lyndon McLellan is the owner of a convenience store in Fairmont, North Carolina, a small town just up I-95 from the state's border with South Carolina. On the advice of a bank teller, McLellan began making deposits below $10,000 to save the bank burdensome paperwork required under the Bank Secrecy Act, a 1970 law aimed at deterring money laundering and a host of other crimes, including illicit drug activity.