The Select Committee on Assassinations of 1979 disagreed with the Warren Report findings.

https://spartacus-educational.com/JFKkellerman.htm

Findings of the Select Committee on Assassinations in the Assassination of President John F. Kennedy in Dallas, Texas, November 22, 1963.

The committee believes, on the basis of the evidence available to it, that President John F. Kennedy was probably assassinated as a result of a conspiracy. The committee is unable to identify the other gunman or the extent of the conspiracy....