The problem is in arrested vs. convicted. For one, it sets a precedent for future violations of civil liberties. It would cost a fortune. Human error is always

The problem is in arrested vs. convicted. For one, it sets a precedent for future violations of civil liberties. It would cost a fortune. Human error is always a concern, especially dealing with this volume entries and the size of this database. In other countries where they've tried this it hasn't done much to solve crimes (The UK, for example). But the biggest concern is it's yet another example of government overstepping it bounds. Nothing will ever keep us 100% safe and yet this takes away more of our freedom. We have a right to not be subjected to unreasonable government interventions unless there is evidence, backed by a jury of our peers, to say that we've done something wrong.