JOHN - You say you shook that glove "all about". As pictured, your wrist looks larger than the glove opening.
We have no idea what led this impostor to be without a glove. We also have no idea why Haygood would be without a glove either. Being this impostor is 1st seen at the rear of the string of train cars, I think whatever happened, happened right there. Whether inside a train car or on the other side of the train cars. As I have mentioned before, we do Not know what was on the other side of that string of train cars. We also can Not see inside the train cars.
JOHN - You say you shook that glove "all about". As pictured, your wrist looks larger than the glove opening.
This is now getting ridiculous, the most practical way to carry the glove would be to do it as I have shown and the fact that your best comeback is to doubt my honesty, isn't very nice.
The following end on photo shows that my glove was simply doubled over, which just makes carrying the glove more comfortable, whereas your scenario seems to be a glove should be held in any specific way that distracts from your "theory".

We have no idea...
We also have no idea why Haygood...
we do Not know....
We also can Not see....
This perfectly sums up your conspiracy, you have taken an event which I have explained to you in intricate detail and given a logical plausible sequence of events and now you are just splitting the already split hairs. Your "imposter" theory as you have just repeatedly said has no reasonable explanation, like you said "you have no idea" and for that matter everyone, besides you, who has looked into this keeps telling you that it makes no sense and goes nowhere. Any potential assassins and their equipment would have been long gone, they would have jumped in a car and sped off and your latest theory of these "Boogey men" hiding in a stationary train car is just another desperate attempt to keep this silliness alive.
But in closing just let me repeat this very important fact, and repeat after me, "When your lone patsy is high and behind having ANY frontal shooter is real stoopid"!
JohnM