FACES顔認証が冤罪逮捕を招く ― しかも今回が初めてではない
訴訟資料によれば、長年運用されてきたFACESシステムの93%という一致スコアがRobert Dillonの冤罪逮捕につながったという。警察活動においてアルゴリズム上の類似性を確実性として扱うことの危険性を浮き彫りにしている。
the aclu has filed a lawsuit against florida police departments after the FACES facial recognition system—a database containing tens of millions of images—generated a 93% similarity score that led to the wrongful arrest of robert dillon. despite dillon living 300 miles from the crime scene and having no prior connection to the area, officers treated the algorithm's match as a near-certain identification and allegedly failed to include exonerating evidence in warrant applications. the complaint highlights a fundamental misunderstanding of probability in policing, where a similarity score on facial features was conflated with the likelihood of identity. this incident serves as a critical warning for law enforcement agencies relying on legacy biometric tech, revealing how automation bias can override investigative due process and lead to severe civil rights violations.