Larry David Grathwohl (October 13, 1947 – July 18, 2013) was a United States Army veteran and an FBI informant during the 1970s. He is best known as the informant who infiltrated the Weather Underground, a radical political organization in the United States. His exploits were documented in the 1976 book, Bringing Down America, where he exposed the inner workings of the Weather Underground and the personal activities of many of its members, including Bill Ayers and Bernardine Dohrn. He died, aged 65, in his Cincinnati apartment on July 18, 2013 apparently of natural causes.
- Larry Grathwohl, Bringing Down America: An FBI informer with the Weathermen. New York: Arlington House. 1976.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>