"I know from the Border Patrol that about 20% of the 3,000 the last couple of years are packing hard drugs," he says. "The evidence appears to be it's all hard drugs. Fentanyl, cocaine, heroin, meth." By all accounts, there is a significant amount of human smuggling in the mountains and desert around Nogales as migrants pay smugglers thousands of dollars to sneak them into the U.S. without detection. Borderwide, CBP estimates there have been more than 1 million known "gotaways" over the past two years.