> one of them is some sketchy murder for hire allegations from a low-credibility source
The source is a bunch of chat records from Ulbricht's seized laptop. There's a fairly detailed description of the evidence here [1].
[1] https://s3.amazonaws.com/s3.documentcloud.org/documents/1391...
The issue is that the law enforcement agent investigating the allegation had serious credibility issues, but the same agent had access to the laptop, so now you have a chain of custody problem. How much of the chat logs are real and how much of them are made up by this guy who was convicted for extorting Ulbricht?
In particular, the chat logs allegedly contain multiple separate instances of murder for hire, but then the claim that Ulbricht had already been sentenced to life without parole as the reason these claims were never prosecuted doesn't make sense, because a conspiracy to commit murder has multiple parties, so where are the murder prosecutions of these alleged contract killers and co-conspirators?