The Parker family (he was born Robert LeRoy Parker) maintained that he returned from Bolivia and they and others saw him on occasion. A sister wrote a book that included some details. There are further by people who had been acquainted with him. But beyond this hearsay, there’s little or no evidence to support the claim. I’ve often wondered myself if there is some truth behind it.
Romanticizing them and not wanting to let them die.
How many sightings of Jesse James,
Elvis?
DB Cooper?
Many prefer the myths that they lived beyond, rather than their demises.