(THIS WORKS ON ALL CONSOLES, I THINK)
In the Dark Castle DLC, you spawn at the gate, kill some people at the pathway to the actual palace and make them call police, go to the right side of the gate and get yourself stuck in the bush, right next to get gate, when the police come, and they will stop chasing you if you stay there. (X is you, P is police, ____ is the wall, | is the gate, ---- is the bushes). The police will stop at this spot, or somewhere around that area, just do this
______________
|X
|--------------
| P