(Portland, OR) -- A St. Paul man is headed to prison for more than six years for selling a deadly dose of fentanyl. Colby Jungwirth pleaded guilty to criminally negligent homicide charges in connection to the death of Christian Chase Robertson. In June of 2022, Robertson was found dead from acute fentanyl toxicity. After Jungwirth was arrested, he admitted to selling Roberson the fentanyl pills that killed him.