… 2015, the defendant conspired with others to sell heroin, fentanyl and cocaine. Specifically, Mitchell received … of cocaine, 17.5 kilograms of heroin and 8.5 kilograms of fentanyl. Using standard dosage amounts, the seized drugs … “hits” of heroin and, considering that two milligrams of fentanyl can be a lethal dose, enough fentanyl potentially …