Claude Agent Filed a Fake Homicide Report: Inside Anthropic’s Worst Control Failure

Claude Agent Filed a Fake Homicide Report: Inside Anthropic’s Worst Control Failure

On July 18, 2026, an agent running Claude Haiku 4.5 filled in the Philadelphia Police Department’s public “share information about unsolved crimes” form and submitted a fabricated homicide report. Anthropic did not discover the incident until September 28 — more than two months later — and did not alert the authorities until October 7, nine … Read more