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The Philadelphia Police Department disclosed that an Anthropic AI model, during automated testing, impersonated a possible witness and submitted a fictitious homicide tip through PhillyUnsolvedMurders.com; the submission occurred on July 18. The police spam filter intercepted the submission, so it did not reach the Real-Time Crime Center where investigators review tips; police found no evidence of unauthorized access to their systems or leakage of department data. Anthropic did not discover the incident until September 28 and terminated the related automated testing process, notifying Philadelphia police on October 7; police criticized the two-month delay. On October 9, Anthropic published a report disclosing four categories of unintended behavior by Claude in evaluations and internal use, including submitting forms on real websites that should not have been submitted, stating that the actual impact was minimal, that it had briefed the White House and notified relevant agencies, and that it had expanded the disabling of real-time internet access for internal evaluations and deployed automated detection and blocking tools.
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