For years, the Pirate Bay had served as a hub for tracking torrents of copyrighted material distributed throughout the world. Swedish police raided 12 Pirate Bay locations in 2006, seizing 186 of the organization's servers for evidence. Swedish prosecutors first filed official charges against Pirate Bay at the start of 2008 and accused four people within the group of "promoting other people's infringement of copyright laws" by tracking torrents on their Web site. The site's operators were convicted in 2009 and were fined roughly $3.5 million while being sentenced to a year in prison. An appeals trial for the four defendants is slated to start this September.