(Douglas County, OR) -- A traffic stop led to a massive drug bust on I-5 in Douglas County. Oregon State Police say they seized 100 pounds of fentanyl-laced pills in last week's bust. That's 450-thousand individual doses. The suspect, 32-year-old Gustavo Alonso Franco Valenzuela, of Los Angeles, told troopers the shipment of illegal drugs was headed for distribution in Portland. Valenzuela was arrested and federally charged with delivery of a controlled substance.