Not really,, Josh is not finding or doing anything himself... he is using unproven theories and conjecture from others.
His show is essentially TV "clickbait".. nothing is proven or resolved. Mostly rehashed stuff. His show is made to be entertaining not informative.
For the Dean car he covers known stuff about it then uses the claim from a guy that he helped seal it in a wall of a building,, this isn't new and was never proven.