Missing ex-Air Force research chief William Neil McCasland vanished from his Albuquerque home days after Donald Trump ordered the release of all US government UFO and extraterrestrial files.
Now, UFO whistleblower David Grusch has directly linked the 68-year-old scientist to an alleged effort to prepare Americans for disclosure, refocusing attention on McCasland's disappearance and his dealings with campaigner Tom DeLonge.