Again you misrepresent what happened. The officer who questioned the plaintiff wasn't the same officer who shot him.
If that happened to me, and I had to endure some cop asking me the same question over and over again, I would likely be so delirious with pain and anguish that I would say anything to get him to shut up. Given the circumstances, I fail to see how anyone could fully understand what he was saying and the consequences of his actions.
I still can't get the image out of my mind of Harry Callahan grinding his foot into the leg of a kidnapper, after he shot him with his .44Mag, and asking "Where's the girl?"
My bad - still, the cop was out of line.