Long before the sun comes up to bake the Arizona desert, the Maricopa County sheriff's deputies get ready for the day's pursuit.
Their prey? Illegal immigrants. Their method? Look for minor traffic violations. "Nightline" recently rode along with Sgt. Manny Madrid.
"The objective is basically to make stops on these vehicles, screen these individuals [to see] whether they're in this country illegally," said Madrid.
With 4 million residents, Maricopa (which includes the cities of Phoenix...Full Story