perpetrator. and some in france are outraged over the treatment of the head of the imf, accused of attempted rape. france's former culture minister called it a lynching, that provoked horror and aroused disgust. french law bars the media from showing suspects in handcuffs before they're convicted. some say the perp walk goes against the presumption of innocence. >> it is done some would say to humiliate the suspect and they give off an aura of guilt. >> reporter: though sometimes the aura doesn't fit the alleged crime from the smiling, accused somali pirate to the jfk terror plot suspect. others bend down or cover up to conceal their identity. suspects use anything that's handy and we do mean anything to hide from the cameras during a perp walk. amy fisher, the long island local leet that used her own hair to keep her face out of