Fifty-three-year-old New Mexico woman Melissa Casias has been missing since Thursday, June 26, 2025.

Her family doesn’t understand why.

“I can’t grasp it,” her husband, Mark Casias, told Dateline. “I don’t know. I can’t figure it out.”

Mark says the last time he saw his wife was around 6:15 that morning when she dropped him off at Los Alamos National Laboratory (LANL) — a research lab in Los Alamos, New Mexico, where he and Melissa both work. “She took me, dropped me off, and I told her I needed the car by around 11,” he said. “She said she’d have it back by about 11 o’clock, like she usually does.”

Read more: nbcnews.com

Melissa Casias