They must have attended the Covering Gun Violence workshop at the Dart Center for Journalism and Trauma funded by Everytown for Gun Safety. Everytown for Gun Safety is Bloomberg's anti-gun group.
Apply Now: Covering Gun Violence | Dart Center for Journalism & Trauma
Not as bad as some of the headlines for this story. A quick Google search turned up " Oklahoma survivalist shoots police chief 4 times", and " White man shoots black police chief , and walks free".