Key takeaways

• Four people central to earlier coverage remain publicly listed as missing, although they were not all scientists.
• Melissa Casias’s remains were discovered in May, changing the earlier missing-person tally.
• There has been no direct evidence establishing that the disappearances were connected or intended to prevent UFO disclosure.

Months after reports about missing scientists and unexplained deaths drew national attention, four names remain unresolved in the public listings reviewed for this report: Monica Jacinto Reza, William Neil McCasland, Anthony Chavez, and Steven Abel Garcia. Reza appears in California’s missing-person database; the three men appear in New Mexico’s. These are public-record checks, not fresh confirmations obtained directly from investigators. California DOJ, New Mexico DPS.

Their disappearances deserve continued scrutiny.

For the record, their professional backgrounds do differ widely, and a connection to aerospace or nuclear work does not, by itself, establish involvement with unidentified anomalous phenomena, or UAP.

Monica Jacinto Reza, a metallurgical engineer, disappeared while hiking in California’s Angeles National Forest on June 22, 2025. California continues to list her as missing. She was 60 when she vanished. California DOJ, SFGATE’s original search report.

Her technical accomplishments are documented independently of the disappearance. Boeing identified her professionally as Monica Jacinto and credited her with co-inventing Mondaloy, a strong, burn-resistant alloy developed for aerospace applications. That establishes substantial rocket-materials expertise. It does not establish that she studied recovered extraterrestrial technology. Boeing’s 2004 announcement.

William Neil McCasland, a retired Air Force major general and astronautical engineer, disappeared from his Albuquerque home on February 27, 2026. A public case page updated July 9 lists his case as open and reports that his phone, prescription glasses, and wearable devices remained at home. Solve the Case.

His military credentials explain the attention: he commanded the Air Force Research Laboratory and held senior positions involving special programs and space acquisition. Official Air Force biography.

McCasland also had an association with Tom DeLonge’s To The Stars organization. However, his wife, Susan McCasland Wilkerson, described that involvement as brief and unpaid, and disputed claims that he possessed special UFO knowledge.

Anthony Chavez, a retired Los Alamos National Laboratory worker, was reported missing in May 2025 and remains in New Mexico’s database. Reporting based on police records describes his vehicle and personal belongings being found at home, with subsequent searches failing to locate him. Reports differ about his former job title; the evidence reviewed by USA Herald does not establish that he was an active UFO researcher. New Mexico DPS, Los Angeles Magazine’s records report.

Steven Abel Garcia was last seen in Albuquerque on August 28, 2025, according to his state missing-person listing. Published reporting describes him as a contractor and property custodian associated with the Kansas City National Security Campus’s Albuquerque operation. New Mexico DPS.

An important correction concerns Melissa Casias, the Los Alamos administrative assistant included in earlier coverage. Her remains were discovered May 28, 2026, in Carson National Forest and subsequently identified. She should no longer be counted among those whose whereabouts remain unknown. The Guardian.

For UFO disclosure, the clearest documented consequence is increased congressional scrutiny. On April 20, House Oversight leaders James Comer and Eric Burlison requested briefings from federal agencies about the deaths and disappearances, scientific secrets, and personnel safety. The inquiry established that lawmakers wanted answers; it did not establish a coordinated operation. House Oversight announcement.

The disclosure implications therefore remain conditional. If investigators establish that someone disappeared because of information they intended to provide, witness protection and preservation of that evidence would become central issues. The sources reviewed here do not establish that scenario.

For now, these cases support demands for accurate updates and accountable investigations. They do not demonstrate that UFO disclosure has been stopped, that extraterrestrial evidence has vanished, or that the missing people shared a secret.

Families deserve answers about what happened to their loved ones. The public deserves evidence before those unanswered questions are presented as proof.