I believe the evidence in the JFK case should speak for itself. No book-length essays required.
The Newmans were on November 22, 1963 a family of four who came out to show their kids the visiting president. The picture above shows Jean and William Newman on the ground, protecting their kids from gunfire.
The testimony of William Newman, attached to this blog, explains why they had to take cover: "..we were in the direct path of fire" because the shots "had come from the garden directly behind me." The gunmen are visible in the Orville Nix film.