On May 4, 2012, the U.S. Department of State selected Environmental Resources Management (ERM) to author a Draft Supplemental Environmental Impact Statement, after the Environmental Protection Agency had found previous versions of the study, by contractor Cardno Entrix, to be extremely inadequate. Project opponents panned the study on its release, calling it a "deeply flawed analysis". An investigation by the magazine Mother Jones revealed that the State Department had redacted the biographies of the study's authors to hide their previous contract work for TransCanada and other oil companies with an economic interest in the project. Based on an analysis of public documents on the State Department website, one critic asserted that "Environmental Resources Management was paid an undisclosed amount under contract to TransCanada to write the statement".