Sounds like a vary tall tale. Especially with the lack of details.
The trainers operated in very specific location, so it's not likely that a random person, State Trooper or not, would witness one just landing outside their area of operations.
That and the trainers only carried one person, and they didn't wear "spacesuits" but normal flight suits.
The actual training was done at Ellington Airfield, in Texas, ref 'Unconventional, Contrary, and Ugly:The Lunar Landing Research Vehicle' NASA SP-2004-4535