On November 27, 1978, George Moscone, the mayor of San Francisco, and Harvey Milk, a member of the San Francisco Board of Supervisors, were shot and killed inside City Hall by former Supervisor Dan White. On the morning of that day, Moscone intended to announce that the Supervisor position from which White had previously resigned would be given to someone else. White, angered, entered City Hall before the scheduled announcement and first shot Moscone in the Mayor's office, then Milk in White's former office space, before escaping the building. Board of Supervisors President Dianne Feinstein first announced Moscone and Milk's deaths to the media, and because of Moscone's death, succeeded him as acting mayor.

George Richard Moscone was an attorney and Democratic politician who was the 37th mayor of San Francisco, California from January 1976 until his assassination in November 1978. He was known as "The People's Mayor," who opened up City Hall and its commissions to reflect the diversity of San Francisco, appointing African Americans, Asian Americans, and gay people. Moscone served in the California State Senate from 1967 until becoming mayor. In the Senate, he served as majority leader. Moscone is remembered for being an advocate of civil progressivism.