Silk Road was a Tor Hidden Service darknet marketplace launched in February 2011 by Ross Ulbricht, operating under the pseudonym 'Dread Pirate Roberts.' By October 2013 it had facilitated approximately $1.2 billion in Bitcoin-denominated transactions, primarily drug sales. FBI agent Christopher Tarbell arrested Ulbricht on 1 October 2013 at a San Francisco public library after Ulbricht left his laptop logged in. Ulbricht was convicted on 4 February 2015 in the Southern District of New York on seven counts including money laundering conspiracy and drug-trafficking conspiracy, and sentenced to life without parole on 29 May 2015. Two federal agents — DEA's Carl Force IV and USSS's Shaun Bridges — were convicted of embezzling over $1.1 million in Bitcoin during the investigation. President Trump commuted Ulbricht's sentence on 21 January 2025.