Looking at all these comments, did no one watch Minority Report ? The whole film was about the difficulties and ethics of "precrime" and arresting people before they even committed a crime. Obviously we aren't doing that here, but stories often exaggerate a bit. I'd also like to add another good series that explores this topic even more than Minority Report : Psycho-Pass . Psycho-Pass is more extreme in that there's…
"But the oddest is STATIC-99. It's a way of predicting whether sex offenders are likely to commit crimes again after they have been released. In America this is being used to decide whether to keep them in jail even after they have served their full sentence.
STATIC-99 works by scoring individuals on criteria such as age, number of sex-crimes and sex of the victim. These are then fed into a database that shows recidivism rates of groups of sex-offenders in the past with similar characteristics. The judge is then told how likely it is - in percentage terms - that the offender will do it again.
The problem is that it is not true. What the judge is really being told is the likely percentage of people in the group who will re-offend. There is no way the system can predict what an individual will do. A recent very critical report of such systems said that the margin of error for individuals could be as great as between 5% and 95%
In other words completely useless. Yet people are being kept in prison on the basis that such a system predicts they might do something bad in the future."