The Feb. 27 disappearance of a retired Air Force major general with a vast institutional knowledge about UFOs is a "grave national security crisis," says investigative journalist Ross Coulthart. William Neil McCasland, 68, was reported missing after leaving his Albuquerque, N.M., home on foot, according to local authorities, who have teamed up with the FBI to find the former military official. To Coulthart, the way McCasland vanished " reportedly along a running trail without his watch and phone " suggests something nefarious. McCasland ... is also considered a trove of information about whatever secrets the government may be hiding about UFOs, "unidentified anomalous phenomena" (UAPs) and nonhuman intelligent life. During his tenure in the Air Force, McCasland oversaw classified space weapons programs and was head of research at Wright Patterson Air Force Base near Dayton, Ohio, Coulthart notes. That facility has long been rumored to house fragments of extraterrestrial debris from Roswell, N.M. Coulthart said he finds it interesting McCasland's disappearance comes shortly after President Donald Trump promised disclosure about whatever files the government holds on UFOs and alien life. "The timing is screechingly relevant," Coulthart said. "The fact that Gen. Neil McCasland has disappeared off the face of the earth is a grave national security crisis. This is a man with some of the most sensitive secrets of the United States in his head."