( CNN ) -- Jaime Zapata was ambushed by a Mexican cartel last week , authorities say . The U.S. State Department says the attack occurred in Nuevo Leon state on Tuesday and that two of its citizens were killed. His dedication was unparalleled , said his brother .
Jaime Zapata was ambushed by a Mexican cartel last week , authorities say . The U.S. State Department says the attack occurred in Nuevo Leon state on Tuesday and that two of its citizens were killed. His dedication was unparalleled , said his brother .