BANGOR, Maine — A Waterville man Monday was sent back to federal prison for 18 months for refusing to pay restitution of more than $422,000 imposed more than a dozen years ago.

Gregory Violette was sentenced Oct. 31, 2002, in U.S. District Court to seven years and three months in prison on 20 counts of money laundering and fraud, according to a previously published report.

He was indicted on 90 counts 2½ years earlier after federal agents uncovered a sophisticated, expansive fraud scheme that lasted for nine years and included illegally withdrawing funds from banks and credit unions in Penobscot, Piscataquis and Kennebec counties. Seventy counts were dropped after a plea agreement was reached. The banks later were made whole by various insurance companies, firms to which Violette was ordered to pay $422,657 in restitution.

As of June 2, 2015, Violette still owed $406,487, according to the U.S. attorney’s office. He avoided paying restitution by transferring more than $70,000 to his wife, U.S. District Judge George Singal found Monday before sending Violette back to prison.

In addition to prison time, Singal sentenced Violette to two years of supervised release and ordered him to pay the remaining restitution.