Dagmar Hagelin was a 17-year-old Swedish-Argentine girl who disappeared during the Dirty War on 27 January 1977, and is presumed to have been arrested by security forces in El Palomar, Buenos Aires, Argentina, and murdered as a result of a mistaken identification. Dagmar's father, Argentine-Swedish businessman Ragnar Hagelin, worked for several decades to have the responsible people brought to justice, accusing Alfredo Astiz.