A few moments' research reveal many reasons to think the evidence was real, eg:
Ulbricht's right-hand-man Roger Thomas Clark, who was involved in one of the murder-for-hire conversations, admitted the conversation was real during his trial:
"In his own remarks, Clark didn't comment on that murder-for-hire conversation—which he at one point claimed had been fabricated by Ulbricht but later conceded was real."
https://www.wired.com/story/silk-road-variety-jones-sentenci...
Ross is no angel. I'm not disputing that its real, I'm just saying I have a real issue convicting someone when the investigating officers are committing crimes during the investigation. Law enforcement has almost unlimited power. Corruption should be a massive red flag in any case.