Arlen Specter, February 12, 1930 – October 14, 2012, US Senator from Pennsylvania, wrote the Warren Report, the official inquiry into President John Kennedy's death, that said Lee Harvey Oswald acting alone, shot the President in Dallas Texas, November 22, 1963.
https://www.youtube.com/watch?v=i5cCzDbtVnM
YouTube - Discovery JFK assassination.. Lee Oswald is visible standing at the door of the TSBD at 27 seconds in this video.
Specter should have been hauled before a court of capital jurisdiction, and required to explain why he neglected the photo that shows Lee Oswald, at the door of the Texas School Book Depository, the building from where he is alleged to have fired, as the shots rang out.
Another little known fact is that Richard Nixon who succeeded Johnson as President, had been in Dallas on the morning of the shooting, he had flown out prior, looks like there was collusion from him as well.