The Air Force failed to enter the Texas church shooter’s domestic violence conviction into a federal database used for background checks on gun sales — a move that could have prevented him from purchasing a rifle used in Sunday’s mass shooting.

The Air Force said in a statement provided to The New York Times that it hadn’t put Devin Kelley’s court-martial for domestic assault into the database used to run background checks for firearm sales.

Kelley had been court-martialed in 2012 for assaulting his wife and stepson, including cracking the infant’s skull.

The conviction likely would have prevented Kelley from buying the military-style rifle that he used in the shooting, as well as three other guns he had purchased over the past four years, the Times reported.

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