(4-traders.com) Former United States Securities and Exchange Commission attorney Willie Briscoe and the securities litigation firm of Powers Taylor LLP today announced that a class action has been commenced in the United States District Court for the Western District of Texas on behalf of holders of QEP Midstream Partners,...http://www.4-traders.com/QEP-MIDSTREAM-PARTNERS-LP-13875855/news/QEP-Midstream-Partners--Former-SEC-Attorney-Willie-Briscoe-and-Powers-Taylor-LLP-File-Class-Action-20478190/