Swedes may get an answer on Wednesday to the mystery of who shot Social Democrat Prime Minister Olof Palme when the Swedish prosecutor in charge of the case presents his conclusions to an investigation that has lasted 34 years.

Palme was shot dead in central Stockholm in 1986 after a visit to the cinema with his wife and son. The murder sparked a massive manhunt and a plethora of conspiracy theories involving shadowy forces ranging from the CIA and Kurdish separatists to the South African security services.