Joseph Lisser Mathieu and Peterson Benjamin were the subject of a judicial transfer to the United States to be tried and sentenced for their crimes.
They were taken care of by agents from the Drug Enforcement Administration (DEA) and the Federal Bureau of Investigation (FBI).
Mathieu, 55, pleaded guilty in 2006 to conspiring to import at least 5 kilograms of cocaine into the United States. He is accused of violating the terms of his 10-year probation when he fled to Haiti in 2008.
Benjamin is facing kidnapping charges, is implicated in about a dozen kidnapping cases, two of which involved U.S. citizens.
The gang is one of several major criminal groups behind the rise in for-ransom kidnappings in the Port-au-Prince metropolitan area.