I suspect you are not familiar with the name Ross Ulbricht.  But chances are you have heard of his alias, the Dread Pirate Roberts.  The Government claimed that Ulbricht chose the pseudonym from the Princess Bride so that he could anonymously run the Silk Road, an open air online marketplace where anyone could buy or sell all manner of illegal contraband using bitcoin without having to disclose their identity.  The draw of the Silk Road was that people could safely and securely buy or sell items which in the past would have required risking a personal interaction with individuals who may just kill you and take your money rather than conduct a business transaction.

The Government used its vast resources to take down the silk road, but like so many other cases we've discussed, it came down to one very intelligent and dedicated government agent who saw something nobody else did and cracked the case wide open.

From there, you can decide for yourself whether the Government adhered to all their own rules and regulations and whether Ulbricht was simply the creator of the site who passed it on or the continuing mastermind behind all transactions.  

I hope you enjoy discussing this fascinating case and please feel free to leave me any feedback you have.