I had to search:
Twice burned, not shy/Stung by radiation, ridicule, trio stick to UFO story CINDY HORSWELL Staff
SUN 09/15/1991 HOUSTON CHRONICLE, Section C, Page 1, 2 STAR Edition
Cash still has the 1980 Oldsmobile she drove that night. She says the intense heat embedded Landrum's handprint on the padded dashboard.
Also, she said two unidentified men in military uniforms once offered to buy the car. Dr. McClelland, who said his secretary witnessed the offer, suspects somebody wanted to get rid of the car because "ion (electrically charged atom) tracks are visible on the chrome."
Claim repeated in television program:
The Unexplained: “Close Encounters” July 9, 1998
Narration claims: “Strangely, however, the military repeatedly attempted to purchase Betty Cash’s vehicle, but she refused.”
This sounds like a tall tale, especially since the branch of service is not identified. It almost sounds like a Men in Black "silencing" attempt out of a Gray Barker story. In any case, John Schuessler chose not to include it in his articles and book on the case. (He does allow other examples or rumor and hearsay in, such as the story of the overnight road repair.)
Ken Storch of MUFON picked up the case investigation for a while in the 90s, and he claims the car was eventually traced to a new owner in Alabama, but has not been reexamined.