Hidden in the Archives · Drawer 04
FBI Vault
FOIA releases, case files, terrorism investigations, espionage records, and thousands of pages that rarely arrive with a tidy index.
The FBI Vault is the Bureau’s public Freedom of Information Act library. Its records were released through proactive disclosure or because they were frequently requested. That makes it valuable, but not complete. A subject page may contain a handful of files or dozens of separately scanned parts. Names may be misspelled, transliterated, redacted, or buried inside a PDF that search did not recognize.
Approach the Vault as a collection of investigative trails. Start with the name or event you know, record the file numbers and offices you encounter, then keep moving outward.
Start Here
Open the Vault
Use the main search for a specific person, event, organization, place, or case name. The alphabetical index is useful when you know the subject heading the FBI used. Try both before deciding the record is not there.
Keep the file around the file
Save the subject-page URL, PDF part number, date range, field office, file or serial number, and the names appearing in routing stamps. A page that looks unimportant may identify the office, related case, or earlier communication that leads to the record you actually need.
Terrorism & Warning
The 9/11 Files
The Vault’s 9/11 material includes chronologies, interview records, investigative summaries, reports, and releases associated with the 9/11 Commission and later declassification review. Read it beside the Commission records held by the National Archives. The two collections overlap, but they were assembled and released for different reasons.
Open the 9/11 Commission collection →Browse the 9/11 subject files →
Counterterrorism Files
The counterterrorism collections include records on Usama bin Laden, the FBI Terrorist Photo Album, terrorist organizations, investigations, and Bureau guidance. Do not treat a subject page as a finished history. Ask when each record was created, what question investigators were answering, what information had not yet been collected, and what was withheld or redacted.
Browse counterterrorism records →Open the Terrorist Photo Album →
Cases & Institutions
Follow the Investigation, Not Just the Headline
Large case collections show how an investigation develops over time. The Amerithrax files, for example, run across many separate parts and document a multi-agency inquiry rather than a single final answer. Espionage files, including records connected to Robert Hanssen, can lead through people, assignments, offices, and counterintelligence decisions. Historical collections such as COINTELPRO require the same care: read the documents, the program context, and the consequences together.
Open Amerithrax →Open COINTELPRO →Find Robert Hanssen in the index →
From the Research Desk
A released file is evidence, not the entire story.
FOIA records tell you what was documented, preserved, reviewed, and released. They may be incomplete, partially redacted, or separated from related files held elsewhere. Note what the record actually supports, what remains uncertain, and which names, numbers, offices, and referenced attachments give you the next search.