But this week, Cramer's reputation was shattered when he admitted that he worked with Mexican drug dealers. In a Miami federal courthouse, Cramer, 56, pleaded guilty to obstructing justice by helping two drug traffickers avoid arrest, a felony that carries a maximum 20-year prison term.

His plea makes Cramer one of the highest-ranking ICE officials to admit to or be convicted of corruption in the six years since the agency was created. And it raises questions about the ability of Mexican drug cartels to reach the upper echelons of U.S. law enforcement.