Olof Palme was Sweden's Prime Minister from 1969–1976 and 1982–1986. Olof was a controversial politician who dominated Swedish politics for a long time. In 1986, Olof Palme was shot dead on an open street in Stockholm. The assassination has been an unsolved mystery that has plagued Sweden ever since. At a press conference in June 2020, the Police's Palme investigation pointed out Stig Engström as Olof Palme's killer. The Palme investigation is the world's largest murder investigation.