At the end of his book on the assassination, "Witness to History", Aynesworth concluded with these words:
"I have never disputed the possibility of a conspiracy, or conspiracies, behind the Kennedy assassination. Do not doubt that's a story I'd love to break. However, the proof of such a plot continues to elude us.
"So let me add, after fifty year of covering the Kennedy assassination, I am open to any new information if it comes to light and would welcome it no matter where it would lead."