Daniel James "Dan" White (September 2, 1946 – October 21, 1985) was a San Francisco supervisor who assassinated San Francisco Mayor George Moscone and Supervisor Harvey Milk, on Monday, November 27, 1978, at City Hall. In a controversial verdict that led to the coining of the legal slang "Twinkie defense," White was convicted of manslaughter rather than murder in the deaths of Milk and Moscone. White served five years of a seven-year prison sentence.