It baffles me, they've been charged with a felony and they are extended a courtesy?? WTF is right! Maybe the cops are libs and see Bevis and Butthead there as heros?!?!?!
I believe they are draped in sheets for identification purposes. During the lineup or photopack ID it may be "prejudicial" to not have all the people wearing the same clothing. It's a measure used to eliminate the arguement by defense attorneys that their client was singled out by the color/wording of the t-shirt, while hundreds of the same shirt may be worn/sold on a college campus. Hope that clears it up.