"If the mail was used in the commission of a crime or a crime involves postal service employees, we really have no restriction on what we can be involved in," says Dukes. "I believe our mission is unique. The United States Postal Inspection Service has a long, proud, and successful history of fighting criminals who attack our nation's postal system and misuse it to defraud, endanger, or otherwise threaten the American public. As the primary law enforcement arm of the United States Postal Service, the U.S. Postal Inspection Service is a highly specialized, professional organization performing investigative and security functions essential to a stable and sound postal system." Postal inspectors are definitely not just mailmen with guns.