Investigative Service Branch #5608758
Description
The special agents of the National Park Service Investigative Services Branch (ISB) are a specialized and highly trained team of criminal investigators. They work year-round and around the clock to investigate complex, sensitive, and long-term cases for crimes throughout the national park system. ISB special agents are stationed across America and report directly to NPS headquarters in Washington, D.C.
Written by the group; not a statement by this register.
Membership history
Growth
Growth history is still building. We hold one measurement for this entry. A trend needs at least two, taken days apart — so this will fill in on its own rather than being estimated. We do not publish numbers we have not measured.
| Measured (UTC) | Members | Change |
|---|---|---|
| 18 Aug 2026, 09:34 | 2 | first reading |
Ownership
Owned by user #1348818059 as measured.
Members we’ve seen
@AndrewGMerrifield — Supervisory Criminal Investigator (rank 254)
A sample — only members this register has independently measured, highest rank first. Not the full roster.
Related groups
Groups whose measured members overlap with this one — a sample from our membership graph.
Open data
Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)
Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.