My Vince Foster theory is that he whacked himself in one of safe houses that the White House uses when they want to meet people on the sly.
Then, after they found the body, some moron decided they didn't want to burn the location of the safe house, so they moved the body to Ft. Marcy park.
That's plausible.
Also, funny how Roeper disses conspiracy theories as his partner Ebert has long felt that Dubya stole the 2000 election.