SHAMLIAN (voice-over): "Jacob is among the more than 88,0000 Americans who died from overdoses in the 12 months ending October 2020, up 19,000 from the same period a year before."
DEL HIERRO: "It'll live with me for the rest of my life. My wife had to watch as I screamed in bed for my son to breathe."
SHAMLIAN (voice-over): "Border Patrol agent Gerry Galvan knows heartbreak like that often starts here."
GALVAN: "They cut into it and set it up beforehand, so they know where they’re going to be coming through."
SHAMLIAN (voice-over): "As agents say, the cartels use a flood of migrants to move a river of drugs.”