DENVER — A 16-year-old shooter, Desmond Holly, wounded two students at Evergreen High School in Colorado on September 10 before turning the gun on himself, having posted ominous hints of his intentions online, including a photo of a revolver shortly before the attack. The Anti-Defamation League reported that Holly was influenced by extremist ideologies and emulated previous mass shooters, with social media content featuring white supremacist symbols and violent themes.