State police taking inventory of a sedan they towed after catching a North Carolina woman speeding in South Boston found more than two pounds of fentanyl in the trunk, where the driver told them her luggage was packed.Jake Wark, spokesman for Suffolk District Attorney Daniel F. Conley, said the heat-sealed brick of white chunky powder grabbed Monday was one of the largest single seizures of the potentially lethal opioid “in recent memory within Suffolk County.”