As alleged in the criminal complaint, a Darknet Market website is an online market that operates outside the parameters of the traditional Internet, allowing individuals anonymity to buy and sell illegal items, such as firearms and drugs. Such transactions are often conducted for bitcoins. The complaint alleges that beginning in January 2015, Moreira engaged a federal undercover agent in a series of online messages during which Moreira inquired about the potential purchase of several different firearms. Ultimately, Moreira allegedly ordered a Walther PPK/S .380 caliber pistol and silencer from the agent for which he paid the equivalent of $2,500 in Bitcoins. Moreira instructed the agent to ship the package to a Post Office box in Hyannis. Federal agents monitoring the Post office box immediately arrested Moreira after he retrieved the package this morning.
http://www.justice.gov/usao-ma/pr/hyannis-man-charged-bitcoin-purchase-firearm-and-silencer-darknet
Edit: The criminal complain is not available yet
Justin Moreira's previous arrest from 2012:
a multitude of drugs including baggies of powdered Ketamine and Ecstasy, and over 90 oxycontin pills that were illegally possessed by Moreira. In addition, Detectives seized over $30,000 in U.S. currency and various other items including a digital scale and clear gelatin capsules used for drug distribution
http://www.barnstablepolice.com/press_release/12_08_03-Hyannis-Man-Arrested-Had-Drugs-and-$30K.pdf
looks like he got honeydicked hard.