Cold Case Hammarskjöld is a 2019 documentary film by Danish film maker Mads Brügger. It depicts the mysterious death of UN secretary-general Dag Hammarskjöld in the 1961 Ndola United Nations DC-6 crash and also proposes a theory that a South African white supremacist organization is linked to the death, and that this organization has also attempted to spread HIV/AIDS among black Africans. The film investigates the possibility that Hammarskjöld's plane, which crashed in Northern Rhodesia, was shot down by Belgian-British mercenary pilot Jan van Risseghem. After unsuccessful attempts to conclusively prove that theory, the film veers off to investigate the mysterious mercenary organization South African Institute for Maritime Research (SAIMR), managing to contact two new witnesses that claim to have been involved with the organization. Parts of the movie are meta-cinematic, reflecting upon theatrical methods used and the true motivations of the filmmaker.