After the Norman conquest of England, two practical pressures on the state influenced a more complex bail system: a poor prison system and a slow trial process. As criminal justice was increasingly centralised, the state became responsible for holding wrongdoers until trial. Jails were unsanitary and dangerous places, inadequate to be widely used. At the same time the increased use of corporal punishment encouraged individuals to flee before trial. This use of corporal punishment has been linked by Cabrone to the spiralling increase in bail securities and sureties above the original bot system, as the fear of the punishment became so great people were willing to abandon sums of money which were equivalent to the wrong they had committed. As a result, these sums had to be increased so as to reduced incentives to escape justice.