CAN'T TELL THE CROOKS WITHOUT A SCORECARD:

Ms. Butina's efforts to deal in Russian jet fuel, detailed in hundreds of pages of previously unreported emails, were notable not just for their whiff of foreign intrigue but for who they involved: David Keene, a former president of the National Rifle Association and a prominent leader of the conservative movement, who has advised Republican candidates from Ronald Reagan to Mitt Romney. They also involved Mr. Keene's wife, Donna, a well-connected Washington lobbyist, and Ms. Butina's boyfriend, Paul Erickson, who ran Patrick J. Buchanan's 1992 presidential campaign and who moved in rarefied conservative circles despite allegations of fraud in three states.

Their attempt to secure the fuel deal illustrates a reality that investigators have had to navigate in bringing a federal case against Ms. Butina. During her time in the United States, she surrounded herself not only with high-profile American conservatives but also with dubious characters who seemed bent on making a fast buck -- and it was not always easy to tell one from the other.

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