Federal investigators have obtained the phone records of a New York Times reporter who helped uncover the government’s secret domestic surveillance program. The Times reports that former government officials have recently been called before a federal grand jury and confronted with phone records documenting calls with the reporter James Risen. The Justice Department is trying to identify Risen’s sources for the book, State of War, and for articles he wrote for the Times about the nation’s spy agencies. It is unclear how the federal investigators obtained the phone records. The government may have subpoenaed the phone company to hand over Risen’s records.