"He was a top-10 target," said Brian Michael, the agency's deputy special agent in charge in Philadelphia. "He was a large importer of fentanyl." Using not much more than basic internet search tools, the agency determined that Narcoboss had filled more than 6,615 orders for fentanyl at $40 a gram. Federal agents estimated that during a one-year period, Koffie sold more than seven kilograms of the deadly drug and netted at least $260,000.