Recovering old fingerprints

And in other news...researchers at the University of Technology Sydney have found a way to lift previously unrecoverable fingerprints.  Lovely news for crime fighters, not so good for crime writers.  I suspect it's getting harder and harder to write a contemporary mystery in which the traditional puzzle predominates.  It does however underline one of the basic rules of real crime: if you want to murder someone, it's very important to deny the police a crime scene.