1. ANSWER — The official conclusion, upheld by the Warren Commission (1964), FBI investigations, and recent analyses of 2025 document releases, is that Lee Harvey Oswald killed JFK, acting alone as the lone gunman from the sixth floor of the Texas School Book Depository. No conclusive evidence of conspiracy or other perpetrators has emerged, despite ongoing debates and 2025 file releases.123

2. EVIDENCE — Warren Commission Report (Sept. 24, 1964, via National Archives and Britannica, Feb. 18, 2026 update): Oswald fired the shots; no conspiracy evidence.24 FBI (ongoing, site updated 2026): 25,000 interviews confirmed Oswald acted alone.3 2025 releases (National Archives, March 18, 2025, per Trump Executive Order 14176, Jan. 23, 2025): ~80,000 pages on CIA ops, Oswald surveillance, but "nothing undercuts lone gunman conclusion" (AP, 2025; Al Jazeera, March 20, 2025; Northeastern Univ., March 25, 2025).5167 HSCA (1979) suggested possible conspiracy via acoustics (later discredited), but agreed Oswald fired the shots.8 Conflicting info: HSCA "probable conspiracy" unproven; no 2025-2026 changes.

3. CREDIBILITY — 8 (strong official evidence for Oswald as shooter, but persistent unproven conspiracy claims prevent full verification).

4. CONFIDENCE — 9 (overwhelming consistent findings across investigations and latest 2025 releases).

5. BIAS — CENTER (sources: National Archives, FBI, AP, Britannica, Al Jazeera, Wikipedia summaries of official reports).