In a brazen criminal scheme to defraud taxpayers, one of the highest-ranking officials in the U.S. Immigration and Customs Enforcement agency pleaded guilty Tuesday in federal court to helping embezzle $600,000 from the federal government.

Over three years, James Woosley and at least five other ICE employees scammed the agency by fabricating expenses for trips that were never taken and for hotel, rental car and restaurant expenses that did not exist, according to court records.

His son, also named James Woosley, and live-in girlfriend, Lateisha Rollerson -- both ICE employees -- allegedly ran the scam out of the elder Woosley's two Virginia homes.

Here's how it worked, according to court records:

ICE employees traveled to Washington, D.C., on business, but instead of staying at a hotel, they stayed with Woosley. Rollerson allegedly created false receipts from hotels like the local Marriott, while Woosley approved their fraudulent expense reports and charged each employee a kick-back fee for half the amount.