Person
Matthew Brown
Says he is the author of the “Immaculate Constellation” report; former DoD consultant
2024– · New witnesses and pilots · Witness
He presents himself as a former consultant to the Office of the Secretary of Defense and to OUSD(I&S) and later to the Department of State, positions that the sources consulted do not independently verify. On April 29, 2025, on the podcast Weaponized, he declared himself the author of the report, released in 2024 by Michael Shellenberger, on “Immaculate Constellation,” an alleged unacknowledged program said to track human and non-human craft. He was in the audience at the September 9, 2025 hearing without testifying; on August 29, 2026 he was interviewed by Jesse Michels.
- Key claims
- Maintains that in 2018 he came across, on a Pentagon server, the “Immaculate Constellation” program, which is said to track craft of human and non-human origin.
- Says that a slide in the report links the program's origin to the 2017 disclosure of AATIP and that in classified chats Grusch was considered “radioactive.”
- Clarified that nothing in the videos he described necessarily demonstrates an extraterrestrial or non-human origin.
- Reports a briefing by Kirkpatrick to three senators whose transcript he allegedly read (unverified).
- Controversies
- The DoD states that it has no record of any special access program called “Immaculate Constellation,” and the original document has not been produced.
- His reports of harassment and of a home intrusion (2025) rest on a single source.
- Today
- Interviewed by Jesse Michels on August 29, 2026; no official confirmation of his claims.
Documented authority
It measures how documented and verifiable what the person claims is, not their honesty. Each criterion is scored from 0 to 2.
- Credentials 1/2
- The positions he states are reported by specialized outlets but not independently verified.
- Direct access 1/2
- Claims to have seen the material directly, but this is not documented.
- Evidence provided 0/2
- The original report and the slides cited have not been produced.
- Claims track record not applicable
- The sources consulted do not trace the outcome of any verifiable claims made by this person.
- Conflicts of interest not applicable
- The sources consulted do not document financial interests tied to the topic.
Sources
- Liberation Times: Matthew Brown comes forward on “Immaculate Constellation” (2025) (press, pro-disclosure)
- Weaponized: the episode with Matthew Brown (YouTube) (video/audio, pro-disclosure)
- Liberation Times, September 18, 2025 (press, pro-disclosure)
- unexplained.ie, April 30, 2025: Matthew Brown introduces himself (aggregator) (other)
- UFOpedia: profile of Matthew Brown (aggregator) (other)
On this site
Official positions 1
Documents 1
- The 12-page report on “Immaculate Constellation” entered into the House record Authenticity not established
Where the claims come from 2
- An unacknowledged special access program, “Immaculate Constellation,” exists that collects imagery and data…
- The United States has been engaged for decades in a secret “cold war” with rival powers, in particular…
Timeline 2
- Apr 29, 2025: Matthew Brown talks about “Immaculate Constellation” on the Weaponized podcast
- Sep 9, 2025: Hearing of Luna's task force on UAP transparency and whistleblower protection
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UAPgrade's entries are compiled with artificial intelligence (three verifiers with opposing roles) and checked against the sources listed above: how we work. Have a document that changes this entry? Bring it to the Investigations Unit.