Yeah, it would have been a “tell”. Still, I’m thinking once the security guy showed up the POS fired through the door and then did himself. Like he expected swat any time. Haven’t seen the timing to compare security guy, end of firing on festival.
I don’t think tracer fire coming from that much of an elevated position would have given him away for anyone to start firing back while getting shot at. Unless, perhaps, someone with a good rifle and skills was in another building, and not receiving fire.
How long did he shoot? Ten minutes?