This series is hot, but I think the last two images are reversed. I have seen them on the Internet before, and I believe he was stabbed in the heart before he was shot in the head.
As much as my fantasies would have that blade rip though his pump, it may not have at all. He could have died due to blood loss from a stab to the left lung.
Firing squad scenes are a personal (very personal) favorite of mine. I have this image in my collection, and I have often wondered why the guy in the middle seems to be smiling. Perhaps he is one of us...