Maybe he was in Tyler Texas giving a speech to the Kiwanis club just like he and the people there say he was.
"Kiwanis former Vice President of the Kiwani’s club, Aubrey Irby, recalled the speech in an interview with a conspiracy author in a book:
“I remember it was a beautiful fall day,” recalled Aubrey Irby, the former Kiwanis vice president. “George had just started to give his speech when Smitty, the head bellhop, tapped me on the shoulder to say that President Kennedy had been shot. I gave the news to the president of the club, Wendell Cherry, and he leaned over to tell George that wires from Dallas confirmed President Kennedy had been assassinated.
“George stopped his speech and told the audience what had happened. ‘In view of the President’s death,’ he said, ‘I consider it inappropriate to continue with a political speech at this time. Thank you very much for your attention.’ Then he sat down.
Finally, George Bush’s wife, Barbara Bush, wrote down the events that unfolded in her memoir before and after the news that Kennedy was shot. She wasn’t at the club speech, but she was in Tyler, Texas that day and both of them boarded a plane to go to Dallas:
I am writing this at the Beauty Parlor, and the radio says that the President has been shot. Oh Texas — my Texas — my God — let’s hope it’s not true. I am sick at heart as we all are. Yes, the story is true and the Governor also. How hateful some people are.
Since, the beauty parlor, the President has died. We are once again on a plane. This time a commercial plane. Poppy (George H.W. Bush’s family nickname) picked me up at the beauty parlor — we went right to the airport, flew to Ft. Worth and dropped Mr. Zeppo off (we were on his plane) and flew back to Dallas.