Touch of evil

Along the U.S.–Mexico border, a time bomb placed inside a vehicle explodes, killing Rudy Linnekar and his stripper girlfriend Zita. On his honeymoon with his American wife Susie, Mexican special prosecutor Miguel Vargas takes an interest in the investigation. Local authorities arrive on the scene, followed by 30-year police captain Hank Quinlan and his longtime assistant, Pete Menzies. Quinlan and Menzies implicate Sanchez, a young Mexican secretly married to the victim's daughter, Marcia, as the prime suspect. During the interrogation at Sanchez's apartment, Menzies locates two sticks of dynamite in the same shoebox that Vargas had found empty only a few minutes earlier. Vargas accuses Quinlan of planting evidence, and begins to suspect that he may have been doing so for years to help win convictions. Quinlan dismisses Vargas's claim, saying he is just biased in favor of fellow Mexicans.