Some type of threatening behavior by one or more students prompted the schools to lockdown on Wednesday morning. Police ...

The horror inside the school cafeteria unfolded at around 11am Wednesday and was partially streamed online. Now it has emerged that police are probing a sprawling manifesto allegedly penned by ...

Someone reported to the school resource officer that a 15-year-old student had said some concerning things, and further investigation unveiled more disturbing issues.

Analysts with the ADL Center on Extremism "have located a manifesto and social media accounts believed to belong to the ...

Henderson’s diary — described by the Anti-Defamation League as a “sprawling manifesto” filled with ... acts of mass violence and other school shootings, including a massacre at a Nashville ...

The supposed 47-page manifesto included a layout of the Tennessee school, along with photos of the weapons he wanted to use and his thoughts about why he wanted to commit a shooting. His final ...