This was a deliberate action initiated by some local politicians & law enforcement as their way to protest the legalization of marijuana in Colorado !
The shooters got away WAY TOO easy for any another logical explanation . Probably stashed away in the trunk of a police cruiser til the 'coast was clear' ........
@Juan_Leg Sounded more like gangbangers, unaffiliated with the event, to me. They stormed in and apparently attempted to kill someone, then everyone fled. I'm guessing you weren't there. I wasn't there at the time, having felt a couple raindrops a few minutes earlier and anticipated a downpour, but as I walked to my car, people started running past me.