United States Postal Inspection Service
Overview
The United States Postal Inspection Service (or USPIS) is the law enforcement arm of the United States Postal Service
United States Postal Service
The United States Postal Service is an independent agency of the United States government responsible for providing postal service in the United States...

. Its jurisdiction
Jurisdiction
Jurisdiction is the practical authority granted to a formally constituted legal body or to a political leader to deal with and make pronouncements on legal matters and, by implication, to administer justice within a defined area of responsibility...

 is defined as "crimes that may adversely affect or fraudulently use the U.S. Mail, the postal system or postal employees."

An agency with approximately 4,000 employees, 1,200 criminal investigators, an armed uniformed division with 1,000 personnel, forensic laboratories and a communications system, and with 1,000 technical and administrative support personnel, the USPIS leads and assists in numerous joint federal and state investigations.
The Postal Inspection Service has the oldest origins of any federal law enforcement agency in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

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