Melissa Casias, a married mom who worked as an administrative assistant at Los Alamos National Laboratory (LANL), may be linked to a series of mysterious deaths and disappearances of US scientists and military officials with access to potentially sensitive information. Casias was last seen on camera in June 2025 walking alone on a highway without her wallet, phone or keys, and hasn't been seen since. She is one of four high-clearance people who have died or gone missing since June 2025 with connections to UFO-linked retired Air Force Gen. William McCasland. Former FBI Assistant Director Chris Swecker is now worried that her work at LANL may have made her a target for kidnapping.