The MGM trying to avoid responsibility/liability is probably the biggest conspiracy going. For example, Jesus Campos canceling Hannity, disappearing, then appearing on the Ellen D. show, when Ellen is under contract by MGM, with her own slot machines in MGM properties, ads for MGM by her, etc. She was just a cheerleader, asking no real questions, not even about the shifting timeline etc.
Most folks assume all casino hotels are running cameras everywhere, all the time. They are NOT. This is the case only on the casino floors and some offices, the lobby, etc. There were NO cameras in the stairwells or halls of the MBC, only at the elevator banks.
Collaborators could have used the stairwells and halls to move freely without being recorded. A Paddock confederate could have offed him (leaving him as the patsy) and escaped totally unseen immediately after the stop of the ten-minute massacre.
Please read Steyn’s “A theory of the case,” it comes the closest to my thinking. The shooter (purportedly Paddock) skipped firing at a mostly-minority “urban” concert. Why? Perhaps not to obscure “the method is the message,” that is, semi-auto rifles are too evil to allow civilians to purchase.
https://www.steynonline.com/8162/theory-of-the-case