FILE - In this Nov. 10, 2011, file photo, National Basketball Players Association executive director Billy Hunter attends a news conference after a marathon meeting with owners in New York. The union confirmed Friday, April 27, 2012, it has received a subpoena for documents from the U.S. attorney's office in Manhattan and says it will cooperate as the federal government investigates its business practices. (AP Photo/John Minchillo, File)