Do you know any local police officers. It would seem that they would be in the know. Wouldn’t they come forward on obvious discrepancies, even if “off the record”?
Hard to believe that local responders could be shut up so easily.
You wouldn’t need that many. The first responders saw what they saw... dead bodies. They don’t write the official narrative. That can be easily orchestrated by a few at the top. As a government contractor, I have seen 6 figure careers destroyed over a few thousand in cash many of times. So unless the theory is that the event didn’t happen, it could have been pulled off.