Read the indictment. They are monitoring these forums (and much more), they looked how a guy called "altoid" mentioned SR very early on, he had registered that account with his real email (BTW, Theymos: how did they get the email through which he registered his btctalk account?). So they thoroughly monitored "Ross Ulbricht", and they realized he had the same interests of DPR - they wrote about the same books, liked the same videos... So they started to follow his moves... And they caught him.
They are watching.
Plus, its incredible creepy how DPR hired a murder of a canadian guy, he paid 1500 BTC for it and received a pic of the corpse of the guy. What a piece of shit, I lost all respect for him.
crazy shit