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.
Atchison was prolific online, including on neo-Nazi and white nationalist websites. In March 2016, he was investigated by the Federal Bureau of Investigation (FBI) for threatening to commit a mass shooting. The same year, he was in contact with the eventual perpetrator of the 2016 Munich shooting, who killed nine people in Germany later that year. The FBI dropped their investigation after they determined that Atchison, at the time he was investigated, did not own a firearm, and after he convinced them that his threats were merely "trolling".
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