Ask the suspect about the identities of his accomplices. If he is reticent, use an old method (outlawed by the Geneva convention after WWI, by drawing a knife though a clump of garlic and cutting the suspect, ever so slightly, with the knife - I suggest a toe, to start. By the the time you get to his John, he will tell you anything you want to know. Very simple, very quick - and always effective.
Always looking for another use for the “ Stinking Rose “. Filed for future...in a new folder.