The Wall Street Journal Interviews Rick Vasquez and Active Crisis Consulting on Recent Mass Shootings

By Ben Kesling and Zusha Elinson Aug. 5, 2019 6:44 pm ET The gunman who killed nine and wounded at least 27 in Dayton, Ohio, used an AR-15 style pistol in his attack, according to police, a smaller variation on the popular gun that has been used in many of the deadliest mass shootings. The pistol, which has grown in popularity as major gun manufacturers started...