Well, as the science, of course, improves, all offences leave traceable data. Nobody can enter an environment without leaving traceable data. To go back to one of the earlier questions, when the act first came out, the science was very much about getting those obvious bodily fluids that would occur in the cases of murder and sexual assaults. As the science and technology progress, the ability to obtain smaller amounts of data has improved to such a degree that the application of that science to identity, to all crimes, is seen to be a very good thing.
So the offences to which I referred--I believe it was trespassing by night and stalking--we see these as precursor offences. People who are arrested later for more serious offences, serial murders or sexual assaults, typically have started out stalking and trespassing by night. So there can be evidence left at a scene by someone trespassing by night--cigarette butts, handkerchiefs, and so on.