[wdvh]

It seems likely there were at least 2 DPRs. Ulbricht hints at this in his interview: http://www.forbes.com/sites/andygreenberg/2013/08/14/an-inte...

[MichaelGG]

The link to Ulbricht's identity as DPR seems to go back to the beginning of the site. It seems more plausible he did that interview and made up the multiple DPR story to:

A: Advertise his willingness to sell out.

B: Perhaps toss a bit of confusion onto anyone following him.

[Bootvis]

C: In the Princess Bride the Dread Pirate Roberts chooses a successor which will use the same name.