Next airing Fri Mar 23, 10 a.m. ET

Drug-Smuggling Grandma

In a remote corner of Arizona desert, Border Patrol agents use night vision technology to track a group of illegal immigrants. Employing a Blackhawk helicopter and ATVs, agents arrest a suspected smuggler backpacking drugs into the U.S. Meanwhile, officers at a port of entry stop an unlikely but increasingly common drug smuggler -- an elderly woman.