According to Chris Knoepke, a Red Flag Law researcher who is also an assistant professor at the University of Colorado School of Medicine, “there’s no way to look back in time and see and be able to tell whether or not, you know, an ERPO or anything else would have prevented the tragedy that happened.” If the extreme risk protection order had been granted, it would have been illegal for the defendant to possess any firearm, Knoepke said.