Police across Maine were alerted just last month to “veiled threats†by the U.S. Army reservist who would go on to carry out the worst mass shooting in the state’s history, one of a string of missed red flags that preceded the massacre.

Two local law enforcement chiefs told The Associated Press that a statewide awareness alert was sent in mid-September to be on the lookout for Robert Card after the firearms instructor made threats against his base and fellow soldiers. But after stepped-up patrols of the base and a visit to Card’s home – neither of which turned up any sign of him – they moved on.

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