A Philosophical Investigation - Philip Kerr - Bog

When the English government mandates genetic testing for predisposition to violence in the early 21st century, it also creates an elaborate computer network to store the results. But when a computer expert with just such a violent predisposition breaks into the carefully-guarded data, he decides to protect the rest of society by killing off others on the list. Enter Inspector "Jake" Jakowicz, a tough, smart cop who must use all her powers of intuition to track the sociopath who wants to draw her into a chilling dialogue about the nature of life itself.