Mexico's former defense chief Salvador Cienfuegos used his power in office to protect a faction of the Beltran-Leyva cartel, directing operations against rival gangs and even finding maritime transport to ship drugs, U.S. prosecutors said Friday.

Cienfuegos, arrested at Los Angeles Airport on Thursday, took bribes in return for protection that included warning cartel members about U.S. investigations, according to prosecutors in New York who have charged the 72-year-old with four counts of drug trafficking and money laundering.

"In exchange for bribe payments, he permitted the H-2 Cartel — a cartel that routinely engaged in wholesale violence, including torture and murder — to operate with impunity in Mexico," prosecutors said in a court filing.