In 2009, Tepper joined CBS News’ Investigative Unit as Chief of Investigative Projects. His stories were featured on CBS Evening News, CBS this Morning and 60 Minutes. He also contributed to CBS News’ coverage of the Boston Bombing, Newtown Massacre, and the terrorist attacks in Paris, Brussel, and Nice. In November 2013, Len Tepper and the investigative team was cited in a Politico story for having excellent sources inside the FBI.