Time to forget everything you think you know about this assassination—and start over from scratch:
A good place to start is to scroll down until you see two counter-snipers ducking and cowering when the first shot was fired.
Why? Because the first shot was fired at them.
Never heard of the guy. He is missing an X.com blue check mark and has only had a presence on X since 2021. He offers no credentials in his BIO. I clicked on a couple of links you provided and all he is doing is selling T-shirts..