WSJ Law Blog notes here that the U.S. Attorney’s office has increasingly relied on wiretaps in recent high profile insider trading investigations.  Forbes raises the question of whether these insider investigations have escalated into virtual witch-hunts.    Defendants challenged the applicability of the Wiretap Act to insider trading cases but the Federal District Court Judge rejected the argument holding that the insider trading charges were similar in nature to wire fraud where the Act applies.   See the recent Complaint available here.