The corruption case against then Louisiana Representative William J. Jefferson in the United States started on a suspicion of bribery. The FBI raided his Congressional offices in May 2006. He was re-elected to his seat in the fall. On June 4, 2007, a federal grand jury indicted Jefferson on sixteen charges related to corruption. Jefferson was defeated by Republican Joseph Cao on December 6, 2008, and was the most senior Democratic incumbent to lose re-election that year. In 2009 he was tried in the US District Court in Virginia on corruption charges. On August 5, 2009, he was found guilty of 11 of the 16 corruption counts. Jefferson was sentenced to 13 years on November 13, 2009 - the longest sentence ever given to a representative for bribery or any charge.