Four people, including a New York City constabulary officer, were killed erstwhile a gunman opened occurrence successful a Midtown Manhattan skyscraper that is location to nan NFL headquarters. Officials opportunity nan suspect, identified by rule enforcement arsenic a 27-year-old from Las Vegas, died from a self-inflicted gunshot and near a statement that mentions CTE and expresses anger that his intelligence unwellness whitethorn beryllium linked to playing football. NBC’s Erin McLaughlin reports for TODAY.