The House Select Committee on Assassinations (HSCA) was a committee of the United States House of Representatives that operated from 1976 to 1979 to investigate the assassination of John F. Kennedy and the Assassination of Martin Luther King. The committee was established to reexamine both cases following public dissatisfaction with the findings of the Warren Commission (1963-64) and the investigations into King's death. These calls for reexamination occurred alongside broader public skepticism toward official government accounts during the 1970s, while defenders of the original investigations maintained that their conclusions remained well-supported. Some aspects of the committee's methodology, evidentiary handling, and ultimate findings remain contested; these are addressed in the Controversies section below.

The HSCA issued its final report in 1979, concluding that President Kennedy was “probably” assassinated as a result of a conspiracy, based primarily on acoustic analysis of a Dallas police dictabelt recording that the committee's experts interpreted as containing a fourth gunshot. The committee could not identify the individuals or groups it believed were involved, though it stated that it did not believe the Soviet government, Cuban government, organized crime, or various other organizations as institutions were involved, while leaving open the possibility of individual conspirators connected to such groups. With respect to King's assassination, the committee concluded that James Earl Ray was likely not acting alone and that a conspiracy “probably” existed, though it could not identify specific co-conspirators.

The committee's acoustic-based conspiracy finding for the Kennedy assassination was later challenged. In 1982, a National Academy of Sciences panel reviewed the acoustic evidence and concluded that the sounds the HSCA had relied upon did not correspond to gunshots, casting significant doubt on that specific finding. The Department of Justice subsequently stated it had found no persuasive evidence of a conspiracy. The committee's broader investigative record, including witness testimony, ballistics analysis, and documentary review, continues to be cited by researchers across different interpretive camps. For background on the committee's formation and proceedings, see house-select-committee-on-assassinations-history.

• Acoustic Evidence Credible Viewpoint - Holds that the HSCA's acoustic analysis, despite later criticism, identified a genuine fourth shot and that the conspiracy finding for the Kennedy assassination remains scientifically defensible.
• Acoustic Evidence Flawed Viewpoint - Holds that the National Academy of Sciences review demonstrated the acoustic basis for the HSCA's conspiracy conclusion was unreliable, undermining the committee's central finding on Kennedy.
• Lone Gunman Viewpoint - Holds that the weight of ballistic, medical, and circumstantial evidence supports the original Warren Commission and King-investigation conclusions that each assassin acted alone, and that the HSCA's conspiracy findings were not well-supported.
• Institutional Failure Viewpoint - Holds that the HSCA's value lay less in its disputed forensic conclusions than in its documentation of prior investigative shortcomings by the FBI, CIA, and Warren Commission.
• Inconclusive Viewpoint - Holds that the available evidence, including the HSCA's own record, is insufficient to confirm or rule out conspiracy in either assassination, and that the committee's “probable” findings reflected appropriate epistemic caution rather than weak evidence.

• The HSCA's reliance on dictabelt acoustic analysis to support a conspiracy finding in the Kennedy assassination, and the subsequent National Academy of Sciences critique of that analysis, remains a documented point of dispute among researchers. See house-select-committee-on-assassinations-acoustic-evidence-controversy.
• The committee's handling of and conclusions regarding James Earl Ray's role in the King assassination, including questions about unidentified co-conspirators, has been a subject of ongoing dispute among historians, journalists, and members of the King family. See house-select-committee-on-assassinations-ray-conspiracy-controversy.

• History
• Controversy: Acoustic Evidence
• Controversy: Ray Conspiracy Question
• Viewpoint Debate: Acoustic Evidence Credible vs. Flawed
• Assassination of John F. Kennedy
• Assassination of Martin Luther King
• Warren Commission

1. U.S. House of Representatives, Select Committee on Assassinations, *Report of the Select Committee on Assassinations, U.S. House of Representatives, Ninety-Fifth Congress, Second Session* (Washington, D.C.: U.S. Government Printing Office, 1979).
2. National Research Council, Committee on Ballistic Acoustics, *Report of the Committee on Ballistic Acoustics* (Washington, D.C.: National Academy Press, 1982).
3. Gerald Posner, *Case Closed: Lee Harvey Oswald and the Assassination of JFK* (New York: Random House, 1993).
4. Gerald McKnight, *Breach of Trust: How the Warren Commission Failed the Nation and Why* (Lawrence: University Press of Kansas, 2005).
5. William F. Pepper, *Orders to Kill: The Truth Behind the Murder of Martin Luther King* (New York: Carroll & Graf, 1995).