It was Donald Belasario, not Stephen J Cannell, but yes, he met him in the Marines, and Oswald was perfectly capable of making the shots he did, and nutty enough to do it. He was a Commie, and crazy enough that the Soviets didn’t want to deal with him and let him come back to the US.
Yep. Oswald wasn’t just nutty....he was unlikeable, a loser, lazy, hated by everyone, hated America, a good shot, we know exactly what he was doing for the months leading up the murder.
He had no friends and never did. A loner, a loser a communist, a temper, a punk.