Ethics groups are wondering whether the U.S. Department of Justice has become skittish when it comes to investigating members of Congress, after numerous congressional corruption investigations were closed without trial last year, reported the New York Times.Since the department's case against the late Rep. Ted Stevens (R-AK) notoriously fell apart two years ago, officials have halted at least five other corruption investigations against high-profile congressmen, including Rep. Don Young (R-AK) and Rep. Alan B. Mollohan (D-WV), in photo."They're gun-shy," J. Gerald Hebert, the executive director of the Campaign Legal Center, told the New York Times. The Rep. Stevens...