Two Washington fund-raisers have already pleaded guilty in the case.
More than a dozen people have pleaded guilty in the case.
So far, a husband and wife have pleaded guilty in the case.
The two women were the first to be sentenced of 18 people who have pleaded guilty to various charges in the case.
Yesterday, one of the men became the first to plead guilty in the case.
He pleaded guilty in the case, which was brought by Customs officials.
Several other inspectors have also pleaded guilty in the case.
Five other men have also pleaded guilty to various charges in the case.
Four other people pleaded guilty to federal charges in the case.
Their pleas came one day after two other men pleaded guilty in the same case.
