While not proof positive,
Exactly, it is not proof of anything other than maybe an extra ejected shell casing. Like the WC postulated.
You seem to have an idiotic idea that unless evidence is 100% conclusive, it has no probative value and should be ignored. The reality is that evidence usually isn't 100% conclusive and should be weighed for probative value. 3 spent shells don't by themselves prove 3 shots were fired from the sniper's nest, but in conjunction with the statements of JBC, Glenn Bennett, Jarman, Norman, and Williams as well as the majority of spectators in DP who offered their opinion, it becomes highly probative 3 shots were fired from that location.
You constantly state the witnesses are unreliable except on this one issue, and then you only reference the earwitness testimony. A little hypocritical.
My position on witnesses has been consistent. Nothing a witness says should be assumed to be true or false. We should measure the credibility of any witness based on its compatibility with the body of evidence. JBC said he turned to look over his right shoulder upon hearing the first shot. The Z-film shows him doing that at Z164. He said after looking over his right shoulder, he started to turn back toward the front when he felt the second shot strike him. We see JBC react to being shot 62 frames, 3.9 seconds after his initial reaction. This fits perfectly with his description of the shooting.
...the consensus of the witnesses that there were three shots, including the testimony of the three employees who were directly below Oswald.
Did you purposely leave out mentioning the eyewitnesses in your consensus.
The three employees below the SN never stated that at all. Not one of them on their worst day indicated there was an early missed shot. You already know this.
Why do you have to tell an outright lie to make your point? I never cited the three employees on the 5th floor as evidence of a missed first shot and you know it. I cited them as evidence that three shots were fired. I have cited other evidence for a missed first shot, most notably the testimony of JBC whom we see reacting to the first shot almost 4 seconds before either he or JFK show signs of having been struck. One people who are arguing from weak positions have to lie about what someone else has said.
BTW, what do you believe caused Tague's injury?
According to Tague it had nothing to do with the first shot.
You didn't answer the question. I realize this presents a conundrum for you because it limits the possibilities for you. It would leave you with only one apparent possibility, that a fragment from the headshot caused the injury. If that's not what you believe, please clarify, but since you are a troll whose only purpose is to agitate, you never want to tell us what you actually believe because then you would have to defend it.
Tague didn't think it was the first shot. He might or might not be correct about that. There is nothing that refutes or corroborates his statement. It remains an open question.