To be fair it does seem like a rabbit hole especially if you read the court transcripts. I hope we get to the bottom of it over the coming years to officially settle it once and for all.
Personally I'm not comfortable staying anything on this with 100% conviction given the details I've read e.g. https://www.wired.com/2015/02/read-transcript-silk-roads-boss-ordering-5-assassinations/
Discussion
Read this and tell us with a straight face you are convinced it was Ulbricht
https://bitcoinmagazine.com/culture/silk-roads-ross-ulbricht-why-defend-a-murderer