DENVER — The 16-year-old who shot and wounded two students before turning the gun on himself at his high school in Evergreen, Colorado, left hints of his intentions online in the days leading up to the attack, the Anti-Defamation League said. The attacker reposted a photo on X of a revolver and a box of ammunition two hours before Sept. 10's shooting, the ADL said in a report released Friday based on research conducted by its Center on Extremism.

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