I believe O'Donnell's son when he generously, I think, put it that his father suffered from onset dementia. Now tell us the son could have been a CIA "asset".
CIA? See? Wandering off on a tangent. I know that the source of the
O'Donnell was lying blurb came from none other than Dale Myers. We must take his word for what the O'Donnell family told him
Myers buzzed back around the Tippit family too soon after it was revealed in Joe McBride's book "Into the Nightmare" that the father of the slain cop reported strange things concerning his son's murder. He must have been demented, Myers concluded...after all he was 90 yrs old and his family thought so.
Again...lying is not a result of a dementia condition. Sure it is hard to remember stuff and put things in order.
Some but not all of it is a result of age.