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Thomas Crooks lone gunman claim

Investigation and debate over whether Thomas Crooks acted alone in an attack, with the FBI concluding he was a lone gunman but facing criticism over transparency and evidence disclosure.

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Jan 14, 2026

What specific evidence did the FBI cite in concluding the shooter acted alone in the Butler, Pennsylvania attack?

The FBI grounded its conclusion that Thomas Matthew Crooks acted alone on a convergence of physical-scene forensics, chain-of-fire accounting, digital-device exploitation, exhaustive interviews at hom...