JFK Assassination: The Grassy Knoll and Beyond

Q: What is the grassy knoll?

The grassy knoll is a small, raised, grass-covered hill on the north side of Elm Street in Dealey Plaza, Dallas — at the point where President Kennedy's motorcade passed at approximately 12:30 PM on November 22, 1963. Multiple witnesses reported hearing gunshots from the knoll. The knoll is situated ahead-and-right of where Kennedy was struck, and has been the geographic center of alternative-shooter theories since the assassination itself.

Q: Who killed JFK?

The official answer, from the Warren Commission (1964), is that Lee Harvey Oswald acted alone. The House Select Committee on Assassinations (HSCA), in its 1979 final report, concluded that Kennedy was 'probably assassinated as a result of a conspiracy' involving at least two gunmen, based primarily on acoustic evidence from a Dallas Police Department recording. The identity of the second shooter, and the parties behind any conspiracy, has never been established in any official finding.

Q: What is the magic bullet theory?

The single-bullet theory — known colloquially as the 'magic bullet theory' — holds that a single bullet (identified as Warren Commission Exhibit 399, or CE 399) passed through President Kennedy's neck, then struck Texas Governor John Connally, causing his back, chest, and wrist wounds, and finally embedded in Connally's thigh. Critics argue that the trajectory required, the condition of the recovered bullet (near-pristine), and the number and severity of the wounds are inconsistent with a single projectile. The Warren Commission's single-shooter finding depends on this theory; the HSCA's two-shooter finding does not.

Q: What was released in the 2025 JFK files?

On March 18, 2025, the US National Archives released approximately 80,000 pages of previously withheld or redacted JFK assassination records. Among the documents: a Dallas Police Department report mentioning a tip about a second shooter on the grassy knoll; additional CIA surveillance files on Lee Harvey Oswald's 1963 Mexico City visit; expanded autopsy-record discrepancies; and context on CIA Cuba operations contemporary with the assassination. Mainstream analysis concluded the release did not overturn the Warren Commission; independent researchers have argued several of the documents meaningfully support the HSCA's two-shooter framing.

Q: What was the Warren Commission?

The Warren Commission — officially the President's Commission on the Assassination of President Kennedy — was established by President Lyndon B. Johnson on November 29, 1963, to investigate the assassination. Chaired by Chief Justice Earl Warren, its members included Gerald Ford (later President), Allen Dulles (former CIA Director, previously fired by Kennedy), Senator Richard Russell, Senator John Sherman Cooper, Representative Hale Boggs, and John J. McCloy. The Commission's 888-page final report, released September 24, 1964, concluded Oswald acted alone.

Q: What did the HSCA conclude?

The House Select Committee on Assassinations, which investigated from 1976 to 1979, concluded in its final report that 'President John F. Kennedy was probably assassinated as a result of a conspiracy.' The Committee based this on acoustic evidence from a Dallas Police dictabelt recording, which investigators concluded showed four shots fired, with at least one from the grassy knoll. The Committee could not identify the second shooter or the parties to the conspiracy. The acoustic evidence has itself been disputed in subsequent analysis.

Q: What is the Zapruder film?

The Zapruder film is a 486-frame, 8mm color home movie of the assassination, shot by Dallas dress manufacturer Abraham Zapruder from a concrete pedestal in Dealey Plaza. It remains the most complete visual record of the event and is the central evidentiary artifact in both the Warren Commission and HSCA investigations. Zapruder sold the rights to Life magazine for $150,000 in 1963. The film was not shown publicly in its entirety until 1975. The US government formally acquired the original in 1999 for $16 million.

Q: Who was Jim Garrison?

Jim Garrison (1921–1992) was the New Orleans District Attorney who conducted the only criminal prosecution related to the assassination. In 1967 he indicted New Orleans businessman Clay Shaw for conspiring to murder Kennedy. Shaw was acquitted in 1969. Garrison's investigation, though legally unsuccessful, produced substantial evidence about CIA-connected figures in New Orleans and was the basis for Oliver Stone's 1991 film 'JFK.'

Q: Why was Oswald killed?

On November 24, 1963 — two days after Kennedy was killed — Lee Harvey Oswald was shot and killed by Dallas nightclub owner Jack Ruby (born Jacob Rubenstein) as Oswald was being transferred between Dallas Police facilities. The killing was broadcast live on television. Ruby was convicted of murder in 1964; he died in prison of cancer in 1967, before his retrial. Ruby's documented connections to organized crime, and the fact that Oswald never stood trial, are central elements of the broader conspiracy case.

Q: What are the main theories about who killed JFK?

The main organized framings are: (1) the Warren Commission's lone-gunman finding (Oswald alone); (2) CIA involvement, advanced by Garrison and others, citing Kennedy's Bay of Pigs aftermath and post-Cuban-Missile-Crisis tension with the intelligence community; (3) organized crime, citing Ruby's and Oswald's documented connections and the Kennedy administration's anti-Mafia posture; (4) Cuban-exile involvement connected to Bay of Pigs veterans; (5) Soviet or Cuban state action (considered and rejected by the Warren Commission); (6) Lyndon Johnson's involvement, advanced by former aides and journalists; and (7) military-industrial complex, citing Kennedy's Vietnam disengagement plans. Most serious independent researchers argue the answer involves elements of several of these rather than any one alone.

Two US government bodies have investigated the Kennedy assassination at length. The Warren Commission said one shooter. The House Select Committee on Assassinations said probably a conspiracy. The official position is therefore split — and has been for 46 years.

Where it started

President John F. Kennedy was shot at approximately 12:30 PM on November 22, 1963, as his motorcade passed through Dealey Plaza in downtown Dallas, Texas. He was pronounced dead at Parkland Memorial Hospital at 1:00 PM. Texas Governor John Connally, riding in the same car, was seriously wounded. Within 90 minutes, Lee Harvey Oswald — a 24-year-old former Marine and Texas School Book Depository employee — was arrested at the Texas Theatre. Two days later, on November 24, Oswald was shot and killed by Dallas nightclub owner Jack Ruby while being transferred between police facilities. The killing was broadcast live.

President Lyndon Johnson appointed the Warren Commission on November 29, 1963. Its September 1964 report concluded Oswald acted alone. In 1976, Congress established the House Select Committee on Assassinations (HSCA), which in 1979 concluded Kennedy "was probably assassinated as a result of a conspiracy." Both findings remain on the US government record. The assassination files were scheduled for full release under the 1992 JFK Records Act; substantial releases occurred in 1992–1998, 2017–2018, 2022, and most recently on March 18, 2025, when approximately 80,000 additional pages were released.

The variations

Unlike most conspiracy topics, the JFK case's "variations" are between official findings, not between official and alternative framings. Independent researchers work in the space between the Warren Commission and the HSCA.

Lone gunman. Oswald acted alone from the sixth-floor window of the Texas School Book Depository. Warren Commission, 1964.
Probable conspiracy. At least two shooters, at least one from the grassy knoll. HSCA, 1979.
CIA involvement. Advanced by New Orleans DA Jim Garrison in the 1967–1969 Clay Shaw prosecution, dramatized in Oliver Stone's 1991 film. Draws on Kennedy's post–Bay of Pigs tension with the CIA and Allen Dulles's subsequent appointment to the Warren Commission.
Organized-crime involvement. Cites Jack Ruby's documented Mafia connections, Oswald's New Orleans connections to Carlos Marcello's organization, and the Kennedys' anti-Mafia posture under Robert Kennedy as Attorney General.
Johnson framings. Advanced by former aides and several journalists over the decades, arguing Vice President Johnson had both motive and the operational capability to coordinate through Texas political networks.
Military-industrial complex framings. Tied to Kennedy's planned Vietnam drawdown (NSAM 263, October 1963), subsequently reversed under Johnson.

What researchers point to

Documented · CE 399

Warren Commission Exhibit 399 — the "magic bullet" — is a 6.5mm Mannlicher-Carcano round recovered at Parkland Hospital on a stretcher. The Warren Commission concluded this single bullet passed through Kennedy's neck, then through Connally's back, chest, and wrist, and embedded in his thigh. The bullet was recovered in near-pristine condition. Critics, including medical examiners who have reviewed the evidence, argue the bullet's condition is inconsistent with the trajectory and tissue interactions required by the single-bullet theory. The bullet remains in National Archives custody. The single-bullet theory is the load-bearing assumption underneath the Warren Commission's single-shooter finding.

Documented · the HSCA acoustic evidence

The HSCA's two-shooter conclusion rested primarily on acoustic analysis of a Dallas Police dictabelt recording from a patrol-car microphone reportedly stuck open during the motorcade. Acoustic specialists Mark Weiss and Ernest Aschkenasy, retained by the HSCA, concluded the recording captured four gunshots, with at least one fired from the grassy knoll. In 1982, a National Academy of Sciences panel disputed the acoustic analysis. In 2001, additional analysis re-argued the Weiss-Aschkenasy findings. The HSCA's official conclusion has not been withdrawn, and the dispute remains technically unresolved.

Documented · the 2025 release

On March 18, 2025, the US National Archives released approximately 80,000 pages of previously withheld or redacted JFK records. The release was mandated by a January 2025 executive order. Contents include a previously withheld Dallas Police report mentioning a tip regarding a grassy-knoll second shooter; expanded CIA surveillance files on Oswald's September–October 1963 visit to Mexico City; autopsy-record discrepancies previously partially redacted; and context on CIA Cuba operations contemporary with the assassination. Mainstream analysis concluded the release does not overturn the Warren Commission. Independent researchers have argued specific documents support the HSCA framing.

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Key voices

Jim Garrison (1921–1992) — New Orleans District Attorney; prosecuted the only criminal case related to the assassination (Clay Shaw, acquitted 1969); his book On the Trail of the Assassins (1988) was the primary source for Oliver Stone's JFK.
Mark Lane — attorney and author of Rush to Judgment (1966), the first book-length critique of the Warren Commission.
Josiah Thompson — philosopher and author of Six Seconds in Dallas (1967), a detailed Zapruder-frame analysis.
David Lifton — author of Best Evidence (1980), focused on autopsy inconsistencies.
Gerald Posner — author of Case Closed (1993), the most widely read modern defense of the lone-gunman finding.
James Douglass — author of JFK and the Unspeakable (2008), focused on Kennedy's Vietnam and Cuba policy as motive.
Oliver Stone — director of JFK (1991), which substantially shifted mainstream public opinion and led directly to the 1992 JFK Records Act.

For related coverage, see our pages on Operation Northwoods — the 1962 Joint Chiefs plan rejected by Kennedy — and the death of Marilyn Monroe, which occurred fifteen months before the assassination and involved overlapping Kennedy-administration figures.

The official position

The United States government has two official positions on the Kennedy assassination. The Warren Commission (September 1964) concluded Oswald acted alone. The House Select Committee on Assassinations (July 1979) concluded Kennedy was probably assassinated as a result of a conspiracy involving at least two gunmen, one likely firing from the grassy knoll. Neither finding has been formally withdrawn or reconciled. The 2025 record release has not produced a new official position.

Where it is now

Following the March 2025 release of approximately 80,000 pages, academic and independent-research attention has focused on the Oswald–Mexico City surveillance record, the re-examined Dallas Police acoustic files, and the recently released autopsy discrepancies. No formal US government re-investigation has been announced. The remaining classified material — estimated at a small percentage of the original 1992-Act scope — is scheduled for rolling release through the late 2020s. The Zapruder film resides in the National Archives; Dealey Plaza remains a public site, substantially preserved to its 1963 geometry.

Go deeper

Primary and secondary sources

President's Commission on the Assassination of President Kennedy, Report (Warren Commission, 1964)
US House Select Committee on Assassinations, Final Report (1979)
US National Archives, JFK Assassination Records — March 2025 Release
Mark Lane, Rush to Judgment (1966)
Josiah Thompson, Six Seconds in Dallas (1967)
Jim Garrison, On the Trail of the Assassins (1988)
Gerald Posner, Case Closed (1993)
James Douglass, JFK and the Unspeakable (2008)
Mary Ferrell Foundation — primary-source archive (maryferrell.org)

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Frequently asked questions

What is the grassy knoll?

A small raised grass-covered hill on the north side of Elm Street in Dealey Plaza, Dallas. Multiple witnesses reported gunshots from the knoll. The geographic center of alternative-shooter theories since 1963.

Who killed JFK?

Officially split: the Warren Commission (1964) said Oswald alone; the HSCA (1979) said "probably a conspiracy" involving at least two shooters. The identity of any second shooter has never been officially established.

What is the magic bullet theory?

The single-bullet theory — that Warren Commission Exhibit 399 passed through Kennedy's neck, then through Connally's back, chest, and wrist, embedding in his thigh, emerging near-pristine. The Warren Commission's single-shooter finding depends on it.

What was released in the 2025 JFK files?

On March 18, 2025, approximately 80,000 pages of previously withheld or redacted records: a Dallas Police tip about a grassy-knoll second shooter, expanded Oswald Mexico City surveillance, autopsy discrepancies, and CIA Cuba-operations context.

What was the Warren Commission?

The President's Commission on the Assassination of President Kennedy, established by LBJ on November 29, 1963. Chaired by Chief Justice Earl Warren. Members included Gerald Ford and Allen Dulles. Concluded September 24, 1964 that Oswald acted alone.

What did the HSCA conclude?

In 1979 the House Select Committee on Assassinations concluded JFK was "probably assassinated as a result of a conspiracy" — based on acoustic evidence from a Dallas Police dictabelt. The identity of the second shooter and the conspiracy parties was not established.

What is the Zapruder film?

A 486-frame 8mm home movie of the assassination by Abraham Zapruder. The most complete visual record. Sold to Life for $150,000 in 1963; formally acquired by the US government in 1999 for $16 million.

Who was Jim Garrison?

New Orleans DA who prosecuted Clay Shaw for conspiring to kill JFK (acquitted 1969). The only criminal case related to the assassination. His book was the basis for Oliver Stone's "JFK."

Why was Oswald killed?

Shot by Dallas nightclub owner Jack Ruby on November 24, 1963, during transfer between police facilities. Broadcast live on TV. Oswald never stood trial. Ruby's Mafia connections and the disappearance of a trial are central to broader conspiracy arguments.

What are the main theories about who killed JFK?

Lone gunman (Warren), probable conspiracy (HSCA), CIA involvement, organized crime, Cuban-exile involvement, LBJ, military-industrial complex, or combinations. Most serious independent researchers argue for combinations rather than any single actor.