In the battle to dismantle gun restrictions, raging in America’s courts even as mass shootings become commonplace, a Times’ investigation has found that one study has been deployed by gun rights activists to notch legal victories with far-reaching consequences.Mike McIntire, an investigative reporter for The Times, discusses the study and the person behind it.Guest: Mike McIntire, an investigative reporter at The New York Times.Background reading: 

• Case after case challenging gun restrictions cites the same Georgetown professor. His seemingly independent work has undisclosed ties to pro-gun interests.

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