300th Mass Shooting of the year. Detroit Michigan August 6,2019. DETROIT– four people shot along 7 Mile Road during a dice game while police watch. Another American city that no billboards promoting harmony. Help Prevent unnecessary Acts of Violence by supporting civility awareness reverence See author's posts Continue Reading Previous 299th mass shooting of the year. Suitland Maryland August 6, 2019Next 301st Mass Shooting of the year. Stone Mountain, Georgia August 6, 2019.