(Portland, OR) -- A federal jury in Portland found a Pennsylvania man guilty of distributing fentanyl that caused three people in Oregon to overdose, killing two of them. Court documents show 37-year-old Henry Koffie, who lived in Darby, Pennsylvania, used the names DNMKingpin and Narcoboss on dark web sites to sell fentanyl. He then shipped it through the Postal Service. The first known victim was a 19-year-old Portland State University student who was saved with Narcan. The two victims who died were both 27-years-old. Evidence showed they bought fentanyl from Koffie. Federal investigators also made five controlled buys receiving drugs from Narcoboss. Koffie will be sentenced in May and could face life in prison.