Larry David Grathwohl (October 13, 1947 – July 18, 2013)[1] was a United States Army veteran and a Federal Bureau of Investigation informant in the 1970s.
He infiltrated the Weather Underground[2] and co-wrote a book about his experiences: Bringing Down America: An FBI informer with the Weathermen (1976).
[3][4] Grathwohl was in the 2nd Battalion, 502nd Regiment, 101st Airborne Division from 1965 to 1966 and served in the Vietnam War.
He became a sergeant.