Father Carlos Perez Alonso was born on October 24, 1936 in Briviesca in Burgos, Spain. He joined the Castile Province of the Society of Jesus and became an assistant pastor at the Parish of San Antonio in Guatemala as a prison and hospital chaplain in 1971. He also served as the chaplain of a secondary school, Liceo Guatemala, and as the director of Cursillos de Cristiandad. On August 2, 1981, Father Perez Alonso left a military hospital in Guatemala City after saying mass there around noon. He was kidnapped by various armed men in front of the hospital and never seen again.