I don't think there is any conspiracy. There are no "clear" signs that there were any more shooters than the single Lee Harvey Oswald in the book warehouse. All the tests and all the plausible scenarios seem extremely likely to me, wheras having a second shooter does not fit the evidence.
There is no such thing as the "Mary Mormon Photo". I have not seen ANY "photographic evidence" that "conclusively proves" any part of the original poster's conspiracy theory.