Not only supported it, polychronopolous.
He is the actual dirtbag who came up with the single (magic) bullet theory.
He was a lawyer on the commission.
They had to come up with it after James Tague proved that one of the bullet's hit the curb across the street. A piece of the curb flew up, hitting Tague ion the cheek.
The original plan was to say the first shot hit Kennedy in the throat.
The second shot missed the president and struck Texas Governor John Connally.
Then the third shot struck Kennedy in the head.
After Tague came forward, they were screwed because they knew Oswald didn't have time to get off more than three shots. Also, they had the three spent shells in the depository so they were now painted into a corner.
Out of the blue, Specter came up with the theory even though he had no expertise regarding such things.
A total piece of shit scumbag.