Murphy sponsored a bill that would subject Supreme Court Justices to the same ethical code that applies to other federal judges and suggested in 2011 the possibility of an investigation to decide whether Justice Clarence Thomas had committed ethical violations that would justify removing him from office. The matter in question was Thomas's connection to Harlan Crow and other supporters of the Republican Party. Murphy circulated a draft letter to other members of Congress asking the House Judiciary Committee leadership to hold a hearing on the Supreme Court Transparency and Disclosure Act, which would end the Supreme Court's immunity to judicial ethics laws.