Probed ingest of: THE GREEN BURIAL: She Was Declared Dead Four Days After She Vanished. The Helicopters Were Still Searching.
This Sentinel briefing follows Monica Jacinto Reza’s disappearance, the public record around her aerospace work, and the source’s later comparison to William Neil McCasland’s disappearance.
RELATED ENTITIES
(12)Source Claims
14- Source reportedAsserted
The article states that a Find a Grave memorial page for Monica Jacinto Reza was created four days after her disappearance, while the official search was still ongoing. 
On June 22, 2025, a 60-year-old woman waved at her hiking companion on a ridgeline in the Angeles National Forest.
- Source reportedAsserted
The article states that Monica Jacinto Reza co-invented Mondaloy, a family of nickel-based superalloys.
Reza co-invented Mondaloy, a family of nickel-based superalloys now built into the engines replacing Russian-made rockets for American national security launches.
- Source reportedAsserted
The article states that retired Major General William Neil McCasland disappeared on February 27, 2026.
On February 27, 2026, retired Major General William Neil McCasland walked out of his Albuquerque home and into the Sandia Mountain foothills.
- Source reportedAsserted
The article states that McCasland oversaw AFRL programs and budgets that the source says supported the development and qualification work connected to Reza’s alloy research.
That portfolio funded Monica Jacinto Reza’s work. Her alloy is in the engines his budget was was actively building.
- Source reportedAsserted
The article states that Mondaloy is used in the AR1 engine, Aerojet Rocketdyne’s replacement for the Russian RD-180.
The AR1 engine is Aerojet Rocketdyne’s replacement for the Russian RD-180 that launches America’s national security satellites.
- Source reportedAsserted
The article states that the Air Force’s Hydrocarbon Boost Technology Demonstrator uses Mondaloy.
The “Hydrocarbon Boost Technology Demonstrator”, the Air Force’s program for a reusable 250,000-pound-thrust engine, uses Mondaloy.
- Source reportedObserved
The article states that Monica Jacinto Reza's patent is public record under US 2010/0266442 A1.
The patent is public record. US 2010/0266442 A1. “Burn-Resistant and High Tensile Strength Metal Alloys.” Jacinto et al.
- Source reportedAsserted
The article states that Monica Jacinto Reza was declared dead four days after she disappeared.
On June 26, 2025, four days after Monica Jacinto Reza disappeared and three days before the official search was even suspended, someone created a memorial page for her on Find a Grave.
- Source reportedAsserted
The article states that it found no public reporting indicating Reza’s remains were recovered. 
No public reports indicate her remains were recovered.
- Source reportedAsserted
The article states that the search for Monica Jacinto Reza involved multiple search and rescue units and federal partners.
Montrose Search and Rescue led. They were joined by units from Altadena, Antelope Valley, Malibu, San Dimas, Sierra Madre, San Diego, Ventura County, Orange County, San Bernardino County, Riverside. Federal partners were involved but not publicly named.
- Source reportedAsserted
The article states that a beanie belonging to Monica Jacinto Reza was found in a steep ravine.
On the morning of June 23, approximately 24 hours after the disappearance, a beanie belonging to Reza was found in a steep ravine south of the ridge, descending toward Devil’s Canyon.
- Source reportedAsserted
The article states that the scent trail of Monica Jacinto Reza stopped at the beanie and went nowhere.
Scent dogs tracked Reza’s trail from the upper ridge downward and successfully followed it to the beanie. Then they lost the scent entirely.
- Source reportedAsserted
The article states that no public statements were issued by Aerojet Rocketdyne, NASA, or JPL regarding Monica Jacinto Reza's disappearance.
Aerojet Rocketdyne issued no public statement about her disappearance. NASA issued no public statement. JPL issued no public statement.
- InterpretationUnverified
The article argues that similarities between the Reza and McCasland cases may indicate a broader pattern.
One is a coincidence. This is a pattern.
Structure Across Time
How the key people and organizations in this source are involved as events unfold. Built from the extracted timeline — co-appearance here reflects the source’s narrative, not verified coordination.
Reported disappearance of William Neil McCasland
The source says McCasland left his Albuquerque home on February 27, 2026 and has not been seen since. 
Find a Grave memorial created for Monica Jacinto Reza
The source says a memorial page was created on June 26, 2025 while the search was still ongoing. 
Reported disappearance of Monica Jacinto Reza
The source says Reza was last seen on June 22, 2025 after waving to her hiking companion in the Angeles National Forest. 
Dallis Hardwick's Death
Dallis Hardwick, Monica Jacinto Reza's mentor, died.
McCasland Takes Command of AFRL
William Neil McCasland took command of the Air Force Research Laboratory.
Source Material
15Source Documents
1Deep probes
20Probed ingest of: THE COMPLEX: The Pentagon Just Published the 1949 Green Fireball Files. Our 2026 Coverage Says They Are Returning.
The Sentinel Network · May 27Probed ingest of: THE SIGNAL #007: THE PROBABILITY
The Sentinel Network · May 26Probed ingest of: THE CORPUS: NSA Argued This File Would Damage National Security. Page 236 Reads “Thirteen MIGs Chased One UFO.”
The Sentinel Network · May 21Probed ingest of: THE PRIORS: Kevin Patrick Childress Created a Reddit Account Before AATIP Broke.
The Sentinel Network · May 20Probed ingest of: THE MISSING BIN: We Said SETI Couldn’t Hear a Probe. We Spent 163 Hours Reprocessing Their Data.
The Sentinel Network · May 14Probed ingest of: THE REFRACTOR: A Pentagon Deadline for 46 UAP Videos Lapsed in Silence. The Same 46 Surfaced Elsewhere.
The Sentinel Network · May 7Probed ingest of: THE VIEWPORT: We Built 3I/ATLAS.
The Sentinel Network · May 6Probed ingest of: THE BAIT: A Fabricated Jupiter Impact Reached Our Inbox. Two Weeks of Verification Said No.
The Sentinel Network · May 4Research Map
Entities are linked when they share a claim or a dated event in this source. Tap any node to see why it’s here.
The Sentinel Network