San Juan County Sheriff Ken Christesen said Friday the gunman, identified as William Atchison, entered Aztec High School around 8:00 a.m. local time with a backpack and a .9mm Glock with multiple magazines on him. Christesen also shared a message the gunman had written before the shooting that included a timeline of what the gunman had planned. Christesen called the shooting at Aztec High School a cowardly act and said the shooter was determined to create as much carnage as he could. Authorities said the gunman lived with his parents in Aztec and had worked at a gas station. In...