When the Gunman’s Motive Remains a Mystery: Does It Matter?. Mass Shootings, Boulder, Colo, Shooting (March, 2021), Indianapolis, Ind, Shooting (April, 2021), San Jose, Calif, Shooting (2021), Atlanta Spa Shootings (2021), Las Vegas, Nev, Shooting (October, 2017), Orlando, Fla, Shooting (2016), Hate Crimes