There is no power relation without the correlative constitution of a field of knowledge, nor any knowledge that does not presuppose and constitute at… - Michel Foucault

The different pieces of evidence did not constitute so many neutral elements, until such time as they could be gathered together into a single body of evidence that would bring the final certainty of guilt. Each piece of evidence aroused a particular degree of abomination. Guilt did not begin when all the evidence was gathered together; piece by piece, it was constituted by each of the elements that made it possible to recognize a guilty person. Thus a semi-proof did not leave the suspect innocent until such time as it was completed; it made him semi-guilty; slight evidence of a serious crime marked someone as slightly criminal. In short, penal demonstration did not obey a dualistic system: true or false; but a principle of continuous gradation; a degree reached in the demonstration already formed a degree of guilt and consequently involved a degree of punishment.

This is the moment when it becomes clear that the images of madness are nothing but dream and error, and that if the unfortunate sufferer who is blinded by them invokes them, it is the better to disappear with them into the annihilation for which they are destined.

But a punishment like forced labour or even imprisonment – mere loss of liberty – has never functioned without a certain additional element of punishment that certainly concerns the body itself: rationing of food, sexual deprivation, corporal punishment, solitary confinement ... There remains, therefore, a trace of ‘torture’ in the modern mechanisms of criminal justice – a trace that has not been entirely overcome, but which is enveloped, increasingly, by the non-corporal nature of the penal system