Drawn TestimonyThe trials of criminals who disgust and fascinate the world in equal measure continue to be depicted primarily not at the push of a button but the point of a pencil or the worn down end of a pastel stub. It is the odd, bickering club of court artists summoned at the last minute, jostling for position, scrambling to make permanent an event or expression that has already fled the scene that is still charged with providing the pictures the world hungers