A 15-year-old student killed two classmates and hit a dozen others with gunfire Tuesday, methodically firing a handgun inside a crowded atrium at his rural Kentucky high school. Seventeen students were injured, 12 of them hit with bullets and five others hurt in the scramble as hundreds of students fled for their lives from Marshall County High School. The gunman kept firing until he ran out of ammunition and tried running away. Police arrested him moments later, leading him away in handcuffs to be charged with murder and attempted murder. Authorities did not identify the gunman responsible for the nation’s first fatal school shooting of 2018, nor did they release any details about a motive. The attack marked the year’s first fatal school shooting, 23 days into 2018.