First thought that crossed my mind too.
remember all the people that died "naturally" after the Kennedy assassination - all the "mystery deaths", including Dorothy Kilgallen, the reporter, only one (?) to've interviewed Jack Ruby, told a reported friend/colleague that she was going to press the next morning with a story that would "blow the lid off" the Kennedy killing. She was found dead the next morning - and no notes were found.
Unwise to know too much - and tip your hand ahead of time.
I did not remember what happened to Dorothy Kilgallen. I do recall that Robert Frost also died on Nov. 22, 1963, didn't he?
Hope Dr. Coburn is keeping a low profile. I remember that anyone who questioned the offical story about Kennedy's assassination was deemed a "moonbat". Then there was Ron Brown and Vince Foster, among others.
If he has evidence, he'd better hide it in a safe place.