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. We are 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  |  WASO  |  Enabling Legislation  |  Find a Park  |  Contact Us


ISB Special Agents respond across the National Park System. NPS photo by ISB.

Case Updates and News from ISB

Get the latest case updates and other news from the NPS Investigative Services Branch

An ISB Special Agent stands in a desert landscape.

2018 Highlights of ISB

The 2018 annual report of the National Park Service Investigative Services Branch (ISB), with case updates and features from the year.

Cold cases include missing persons and unsolved incidents. NPS image.

Cold Cases

Cold cases include missing persons and unsolved incidents - do you have information that could help investigators?

Find out more about us in our recap of significant cases and operations.

Annual Reports

We are pleased to share our annual recaps of significant cases, operations, and other noteworthy events that happened throughout the year

You are not alone, and support is available - find out more here.

Victim and Witness Assistance

You are not alone, support is available, and you have rights - find out more here.

Emergency responders face increased risk of experiencing traumatic events.

Support for those who help others

NPS law enforcement and emergency services personnel may experience traumatic incidents as they answer the call for help.

Last updated: October 31, 2019