S. migration and Customs Enforcement agents Jaime Zapata and defeater Avila Jr. were roving on a occupied highway inwards an toughened car with diplomatic plates inwards the north central Mexican state of San Luis Potosi.Suddenly, they were run inedible the road and attacked from two vehicles by a faction of heftily armed men who opened fire at random.Zapata died. Avila survived a gunshot wound to a prop.