When on the traditions of the trade level go to the door that has a sign
saying hotel wing closed pick lock the door and head down the corridor
and the color of the walls will change blue. This is when the ghost will
appear and go into a room with a policeman in it kill the police man and
this is when your crosshair turns red when you fire blood will appear on
the wall but no-one is there. You will then have to go into a room
guarded by a policeman kill him and head into a bathroom and then your
crosshair will turn red again but there is no one there.