"A Freedom of Information Act document released by the Central Intelligence Agency in 2018 states that "a considerable amount of credible circumstantial evidence suggests that Theodore Kaczynski. also known as the Unabomber, participated in CIA-sponsored MK-ULTRA experiments conducted at Harvard University from the fall of 1959 through the spring of 1962".[26] Chase and others have also suggested that this experience may have motivated Kaczynski's criminal activities"