on the night it happened either isis or al-queda took credit , AFAIK the hotel where the attack was staged from is Saudi owned and two the two top floors were Saudi only.
The laptop hard drive was "lost", then it never existed. Paddocks house in Reno, NV was burglarized, what was taken was not reported. I saw a video of that night, definitely at least two shooters using two different rifles at the same time only one firing semi auto . I talked to two survivors ( who did not know each other ) both claimed absolutely more that one shooter .
Shortly after the event, there was "the purge in the kingdom" prominent high ranking members of Saudi ruling class were killed or jailed ( I think it is related ) after Trump visited Vegas he went to Saudi Arabia ( I think it is related )