The Travis Walton UFO incident refers to an American logger who claims he was abducted by a UFO on November 5, 1975, while working with a logging crew in the Apache-Sitgreaves National Forest in Arizona. Walton reappeared after a five-day search. The Walton case received mainstream publicity and remains one of the best-known alleged alien abduction stories, although skeptics consider it a hoax.
The case of travis Walton is so believable because he was missing for 5days and the police investigated the event assuming the other loggers killed him and combed the place and found radioactive spots where he as abducted.
And to make matters even more convincing, all the logging crew where submitted to lie detection tests and all passed. And Travis also passed his test once retuned after 5 days. All this is fully documented as it was first assumed to be a murder case.