I&#x27;m opposed as well (I think big piles of personal info are radioactive), but it&#x27;s worth pointing out that this usage, of finding folks after the fact, should be easy to do in a way that allows proper judicial review, even if the process is expedited. Working from an actual crime makes a lot of things more straightforward vs trying to justify surveillance of someone thought to be a risk, or connected to a risk of some hypothetical future crime.