On December 7, 2017, a school shooting occurred at Aztec High School in Aztec, New Mexico, United States. The perpetrator, William Atchison, a 21-year-old former student of Aztec High, entered the school disguised as a student and hid in the school restroom. He was discovered by student Francisco Fernandez, whom he then shot and killed, before killing another student in the hallway. He attempted to enter a classroom, but a teacher barricaded the door with a couch, preventing him from entering. Atchison then killed himself.