July 31 (Bloomberg) -- On April 6, 2011, FBI agents arrived at the door of Matthew Kluger, a corporate attorney with a long history in mergers and acquisitions. The charge against him: Insider trading. On June 4, 2012, Klugar was sentenced to 12 years in prison and found to be liable for $37 million in illicit profit from tips he passed on to his associates. His 12-year prison sentence is the longest ever for the crime. He shares his story with David Voreacos for Bloomberg News.