Former U.S. Congressman Duncan Hunter Sr. fired back Friday at National Public Radio (NPR) over a podcast detailing his son's involvement in a deadly, friendly-fire incident during the Iraq war. Duncan Hunter Jr. was deployed in Fallujah at a control center in April 2004 when a United States artillery attack killed two U.S. Marines and an Iraqi translator, according to NPR. Hunter Sr. handed out results of a lie detector exam Friday during the news conference, in an attempt to convince the public that he never covered up the friendly-fire incident involving his son. “I put out my right arm, got hooked up to a lie detector test. I passed it. National Public Radio didn't pass theirs,” Hunter Sr. said. “Have you ever interfered in any way with any Marine investigation or disposition of any friendly fire incident? No. Results answered truthfully,” he continued. The 75-year-old Alpine resident was responding to accusations made in an 8-hour NPR podcast called Taking Cover. MORE: https://www.cbs8.com/article/news/local/duncan-hunter-sr-denies-cover-up/509-f55c61f1-bd9c-431e-9ec7-02080aee8c13