The Church Committee investigated CIA plots to assassinate foreign leaders. This Interim Report, published in 1975, discusses alleged plots to kill:
• Patrice Lumumba (Congo)
• Fidel Castro (Cuba)
• Rafael Trujillo (Dominican Republic)
• Ngo Dinh Diem (Vietnam)
• Rene Schneider (Chile)
The Committee also examined the CIA’s development of a general “executive action” capability. The Committee found that the U.S. initiated plots to assassinate Fidel Castro and Patrice Lumumba.
In the other cases, either U.S. involvement was indirect or evidence was too inconclusive to issue a finding.
In Lumumba’s case, the Committee asserted that the U.S. was not involved in his death, despite earlier plotting. The Committee was unable to state with certainty whether any plots were authorized by U.S. Presidents.
Original Church Committee Interim Report:
US Senate Select Committee on Intelligence, Alleged Assassination Plots Involving Foreign Leaders, Washington 1975 (pdf) (351 pages)
US Senate Select Committee on Intelligence (link to Church Committee page, US Senate)
Church Committee Interim Report Table of Contents and supporting documents