A Ukrainian alleged to be the ringleader of the world's biggest online piracy site, Kickass Torrents, has been accused of distributing more than $1 billion worth of illegally copied films, music and other content. The US justice department unveiled a criminal complaint against Artem Vaulin, 30, of Kharkiv, Ukraine, who was arrested in Poland on July 21 and is being sought by US authorities for copyright infringement, money laundering and other charges.