They were denied on the grounds that the lists are trade secrets that may be withheld under Wyoming's open records law.

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The deal was ended four days after the killings, according to a letter released in response to an open records request.

WSJ: Conn., rifle maker end aid deal after killings

Shortly after that, the American Tradition Institute, a group with ties to fossil-fuel interests, asked for the same emails under the state's open records laws.

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