James Tague was standing in Dallas's Dealey Plaza when the shots were fired on Nov. 22, 1963. A bullet presumably meant for Kennedy instead struck a curb near where Tague was standing and sent debris flying into his face. Tague's daughter, Suanna Holloway, said her father died at his home 70 miles north of Dallas on Friday following a brief illness. He was 77. Tague's experience at Dealey Plaza ultimately led Warren Commission investigators to conclude that one of the three shots missed and that one of the rounds went through both JFK and Texas Gov. John Connally. JFK researcher Debra Conway said the commission was initially going to settle with two shots hitting the president and one hitting the governor. But because Mr. Tague was near the missed shot and was wounded they had to account for the missed shot, said Conway, president of JFK Lancer, a historical research group. "Jim is a very important witness." Critics of the Warren Commission have long questioned the so-called "magic bullet theory," arguing that the bullet could not have traversed multiple layers and angles. Through the years, Tague's own curiosity transformed him from eyewitness to JFK assassination researcher. He befriended other JFK assassination buffs, visited the National Archives to inspect evidence and amassed a huge collection of Kennedy-related books. Tague also authored two books, including last year's LBJ and the Kennedy Killing in which he alleges a cover-up plot. "Personally, I'm urging young people to keep the truth alive," he told Yahoo News.