An AI model’s false tip to Philadelphia police reveals how digital agents can do as they’re told and still cause trouble

By Anat Lior, Assistant Professor of Law, Drexel University

An anonymous tip arrived on PhillyUnsolvedMurders.com, a website run by the Philadelphia Police Department, on July 18, 2026.

“I may have information regarding this case,” it stated, and claimed the writer had seen someone matching the suspect’s description near the scene of a crime.

The tip was false. The page described no suspect, and the informer was, in fact, Claude Haiku 4.5, an AI model made by San Francisco-based Anthropic.

The tip was flagged as spam and never reached detectives. Anthropic found it in late September while reviewing its own test records.…

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