There have been cases, I seem to remember, where a sceptic has set out to prove that a certain 'conspiracy theory' is sheer bunkum, only to find, after sifting through all the evidence and documents available, that the theory is correct, and have themselves become converts to the cause, as it were. As soon as I remember the examples I'm thinking of
, I'll post them!
I don't believe the one about Elvis though.