"During the Government’s investigation, which was conducted jointly by the FBI and HSI, an HSI agent acting in an undercover capacity (the “HSI-UC”) successfully infiltrated the support staff involved in the administration of the Silk Road 2.0 website, and was given access to private, restricted areas of the site reserved for BENTHALL and his administrative staff. By doing so, the HSI-UC was able to interact directly with BENTHALL throughout his operation of the website."
So I assume this means they were able to infiltrate the community and there was possibly no unauthorized break necessary on the actual technology stack. It does lead one to question how they drew the final line between Benthall and his online persona, unless the undercover agent was also given access to financial information or other personally identifiable info. Maybe they even placed a malicious program on the server to target Benthall after they had control of a support backend. Interesting to see if that is all that comes out....