It seems an independent researcher who goes by the name "La Moustache" on Twitter managed to correctly ID Variety Jones.

> The research conducted by an independent researcher by the name of “La Moustache” determined that Variety Jones is likely Roger or Thomas Clark.

> [...] The posts, some containing as much as 3,000 words, explain how “Plural of Mongoose” was arrested after being found running an underground cannabis business in UK, amongst other related crimes. At one point, Jones even identifies himself as “Roger Thomas Clark,” which were the same names uncovered by researcher La Moustache. Despite these revelations the FBI have not yet given any response as to their next course of action.

http://silkroaddrugs.org/dpr-mentor-to-be-back-online/

I'm curious if the FBI pieced this together themselves or was it La Moustache who figured it out?

Edit: Also of note...in the criminal complaint they said he is a Canadian national born in 1961... making him 54 years old.

http://www.scribd.com/doc/292196413/US-v-Roger-Thomas-Clark-...