Swedish prime minister Olof Palme is shot dead on a Stockholm street while walking home from a cinema without bodyguards. The case stays officially unsolved for 34 years.
Contested history
Consensus: No one was ever finally convicted; in 2020 prosecutors closed the case by naming a deceased suspect, Stig Engström, who could no longer be charged.
Stig Engström was the killerDebated
Prosecutors named him in 2020 on circumstantial evidence, and Sweden's ombudsman later criticized the one-sided presentation.
Christer Pettersson was the killerMinority view
He was convicted in 1989 on the identification of Palme's widow but acquitted on appeal for lack of technical evidence.
South African apartheid agents did itSpeculation
A former South African police officer made the claim in 1996, but Swedish investigators found no proof.