At a time when Americans have watched too many public officials abdicate their responsibilities to uphold the law, Kentucky Attorney General Daniel Cameron on Wednesday proved to be an encouraging exception.

Mr. Cameron said he knows many won’t be happy with this decision, not least the protesters in Louisville who clashed with cops after they heard the news. But he insisted that the system operate on facts, evidence and the law, not “emotion or outrage.” He also confirmed another fact that had been misreported: The police did knock and announce themselves, and they had a civilian witness to corroborate it.

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