If it was an ISIS/Muzzie snuff film, I’d look for an upload link on the computers, cameras, or cell phone.
anything occult is possible..
October 1 2017, the day this happened, is an anniversary of another mass shooting (oregon)
And with October 1, there are 91 days before the end of the year.
This event was called ‘Route 91 Harvest’ festival.
those seem like occult connections that either are accidental or intentional..