World Sweden closes its 34-year investigation into Prime Minister Olof Palme’s killing June 10, 2020June 11, 2020Kim Hjelmgaard, USA TODAYComments Off on Sweden closes its 34-year investigation into Prime Minister Olof Palme’s killing Swedish Prime Minister Olof Palme was gunned down on a Stockholm street 34 years ago. Investigators finally think they know who killed him.