Every dawn in the early spring of 2011, Matthew Kluger peered out his window, wondering when federal agents would knock at his door. Kluger, a mergers-and- acquisitions lawyer, says he worried that authorities were closing in on him as the source of illegal tips in a three-man insider-trading ring that had eluded detection for 17 years.   Original post on bloomberg.com →   Comments on reddit.com →