Mysiewicz's 6000 word article draws on his experience with guns and policing:
"Unlike most journalists, I’m somewhat familiar with firearms and their use and have hunted and put in serious range time. (As a young man I also ghost wrote articles for police magazines on technology and police procedures.) Listening to the soundtracks in several videos convinces me that the shooting came from two or more locations."
So if "Lee Harvey Paddock" was a patsy, then who dunnit and why? Listen to this interview, read the article, and you will be able to make some educated guesses.