On March 12, 1956, Basque National and Columbia University lecturer Jesús María de Galíndez Suarez disappeared from New York City never to be seen again. While no conclusive evidence was ever uncovered, it has been widely accepted that he was taken by functionaries of the regime of Rafael Trujillo in the Dominican Republic, flown to the island, tortured, and killed. Galíndez, who had worked for the Trujillo regime after fleeing Spain in 1939 and subsequently immigrated to the United States in 1946, had just completed a dissertation on the Trujillato at Columbia. The regime did not look kindly on his chosen perspective and set in motion a plan to have him disappeared. Following his abduction, many U.S. solidarity activists joined forces with Dominican exile groups to push for greater attention to the atrocities of the Trujillo regime as well as for a closer investigation into Galíndez’s disappearance. While Trujillo had similarly disappeared a number of individuals in the United States and other Latin American countries, the Galíndez case is unique for several reasons. First, Galíndez’s life offers a prime example of a transnational identity, of someone who juggled multiple identities and causes, crossed physical and ideological borders, and operated daily with conflicting alliances and allegiances. Second, the murder of the Basque national mobilized a significant collective of solidarity activists in the United States, garnered considerable national press, and built a foundation for future activism. Moreover, as Galíndez had been working as a U.S. intelligence operative since before his arrival in the United States, his story complicates the traditional nexus of solidarity work. Finally, the case offers a unique window onto the geopolitics of the early Cold War (prior to the Cuban Revolution) and the intricacies of the second half of the Trujillo regime.