Quick actions taken by Montana credit union employees helped law enforcement authorities arrest and later convict two men who were part of a far reaching and sophisticated U.S. Treasury check fraud scheme involving tens of millions of dollars coordinated by criminal groups throughout the nation, according to FBI investigators.

One of those men, Dyonte Scott, 24, of Chicago, was sentenced to five years and five months in federal prison last week after admitting he attempted to defraud credit unions in a scheme using stolen identities and a U.S. Treasury check, the U.S. Attorney’s office in Missoula, Mont., said. Scott pleaded guilty earlier this year to bank fraud, aggravated ID theft and possession of a stolen U.S. Treasury check. The other man, Lorenzo Botello was sentenced to 16 months in federal prison in October after he pleaded guilty to bank fraud and possession of a U.S. Treasury check.