That would be how she knew the first question. Among her many days and nights chained to the desk, Hermione had overseen hundreds of files of ongoing cases that active officers were dealing with in the dirty, crime-ridden streets of London. The sudden appearance of high-grade, near-professional distribution of opium had been one of those cases. It eluded all of the officers, including her, until Potter had said something, had practically accused Draco of being responsible.