A federal prosecutor and a team of agents use their knowledge of the blockchain to identify and convict the perpetrator behind the theft of 25,000 Bitcoins from the Silk Road, in addition to the individual who was extorting Silk Road operator Ross Ulbricht.
After discovering that the Silk Road's stolen Bitcoin was likely sold by a corrupt government agent, a couple of blockchain-savvy agents investigate the flow of funds on Wallet Explorer.
A federal prosecutor investigates and brings to justice crimes that have occurred that cross state lines or that are deemed federal crimes by the federal government. It's also important for a prosecutor to know when not to bring a case, even if the facts support a charge, due to limited resources.