CD_in_Chitown:On another note, for the cops...
When you're in the final stages of working over a suspect, the confession just blubbering from his swollen and cracked lips, what do you use to get the blood and mucus stains off the walls? I can see where heavy detergent on a concrete floor is do-able but I'd imagine those sound proof walls wouldn't stand up to alot in the way of abrasives.
Whitewash.