The investigative arm of the National Park Service
The Special Agents of the National Park Service Investigative Services Branch (ISB) are geographically distributed across the National Park System, available year-round and around the clock.
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Our core mission is the immediate and long-term protection of park resources, visitors, assets, employees and residents. We accomplish this through detection, investigation, apprehension, and successful prosecution of persons who violate laws of the United States of America while within, or while affecting, the National Park System.
We are part of the Associate Director's office for Visitor and Resource Protection. Our home is in the Washington Support Office (WASO) Division of Law Enforcement, Security, and Emergency Services.
Our enabling legislation (commonly known as the Organic Act) primarily resides in a set of laws in the US Code specific to the National Park Service (NPS).
Series 1811: Criminal Investigator | NPS Organizational Structure | Enabling Legislation | Find a Park
