Nashville Police Officers Share Heroic Accounts of Responding to Mass Shooting.

Nashville police officers who ended the mass shooting at a private Christian school in Tennessee that left six people dead cited their police training on how they responded to the scene. Detective Sgt. Jeff Mathes, Detective Michael Collazo and officer Rex Engelbert started a press conference Tuesday by offering condolences to the families. They all described how it was luck that they were all in the area last week to respond to the call for an active shooter.