Detailed text transcripts for TV channel - CNN - 20171023:23:50:00
Through the u.s./mexican border. >> almost every car crossing is crossing for a legitimate reason. it's a very small percentage that come in carrying cont contraband. i think when the inspectors pick up on something, their success rate is pretty high. when you saw the dogs sit down at the back of the car, that's how that particular dog alerts. >> reporter: special agent in charge scott brown oversees the tucson field office for homeland security investigations and drugs are a big part of what is what happens every day along the south border of the u.s. the officers port of entry a phenomenal, ...
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