 They were able to respond immediately without regard for their own safety. They were able to investigate this matter and did so in such a professional way that no one was injured. At the Bowie Police Department, Sandra Jones, WTOP News. How can mass shootings be prevented? WTOP's Dick Uliano gets insights from investigators. What the FBI has learned from past mass shootings is that shooters don't simply wake up some morning and choose violence. They think about it, plan, and often share their thoughts with others.