Kirill Victorovich Firsov, the alleged owner of Russian-based anonymous marketplace Deer.io, was arrested on March 7 by Federal Bureau of Investigation (FBI) officials at John F. Kennedy Airport in New York.
Court documents allege that Firsov is the mastermind behind Deer.io — a site that offered darknet-style services in exchange for Bitcoin on the normal web. The FBI estimates it has facilitated more than $17 million worth of sales.