Muliple shooters !
And I do not guess on such matters
Clue, study the after exit routes vs the facts
The archive categorizes mass shootings as incidents in which four or more people
were shot or killed, not including the shooters. This year, more than 520 people
have died in mass shootings and at least 2,000 have been injured, according to
the data.
As gunfire ripped through America in an unprecedented 24 hours, a bleak
milestone in a nation pocked by gun violence was marked: There have been
251 mass shootings in 2019, according to the Gun Violence Archive.