U.S. prosecutors probe whether Castro government was involved in Medicare scam

When he tried Medicare fraud cases, seeing suspects and defendants flee to Cuba became "almost epidemic," said Curtis, who is now in private practice in Washington, D.C.

"This is a remarkable case," he said. "It, for the first time, evidences law enforcement's ability to sift through a complex matrix of financial transactions that were intended to mask a massive fraud whose ultimate beneficiaries appear to be residents of Cuba, not Medicare recipients."