@pandorasbox The narrative is always the single lone (usually dead) gunman. Having two or more perpetrators involved when fabricating a story only makes it much more harder to control that "official" story. If those weaving the story were to admit that there were two or more gunmen involved, then this would change everything.
It would no longer be "lone wolf snaps and goes crazy and kills lots of people and then commits suicide" to "a planned operation with the intent of killing lots of people ... for some nefarious purpose ... with one or more perpetrators still on the loose".
I don't really think it matters that there are all types of holes in the official story. There always are once you dig a little deeper. The mainstream news media, however, report only what they are told by authorities. They do not investigate. They do not look for eyewitness accounts that counter the official version of events. They do not question.
Anyway, just my two cents.
Peace.