(Portland, OR) -- A Portland area drug trafficker faces federal charges for the overdose death of a person who took what they thought were Oxycodone pills. The counterfeit pills had fentanyl in them. The person died in April. Investigators identified several people involved in the distribution chain. Court documents show evidence connected 34-year-old Efrain Diaz-Rangel, a Mexican citizen living in Portland, with the pills. When he was arrested, agents seized a thousand counterfeit pills and a small quantity of heroin. In his home, they found 30-thousand pills, several pounds of heroin, and more than ten-thousand dollars in cash.