Go to the end of the corridor and turn left. Open the door to the showers and step in. There is blood on the floor. There are also numbered evidence markers. Examine the blood blot marked with the number "1". Then go to the sink, with the sign marked "2" and examine the trough to retrieve a prison shank:
Prison Shank
A handmade weapon, sharpened to perfection.
At the third evidence marker, you will pick up a mourning badge:
Mourning Badge
Worn by law enforcement to mourn the death of a fellow officer.
The fourth marker, in the locker, has a bag of crime evidence in it:
Crime Evidence
A black leather glove stained with blood.
The water will suddenly turn on. Go to the door, and see blood spilling through the door. Open it. Keep exploring the showers area. As you examine the wrapped body on the floor, the environment TRANSFORMS into the OTHERWORLD.
Be prepared to RUN. Keep running through the corridors, run away from any Juggernauts you see, do not attempt to fight them. Watch out for guillotine doors. Turn RIGHT whenever you reach a junction. Follow the direction of an arrow on the wall, through a caged Juggernaut. Enter a gray narrow corridor. Slide through the Spike traps, planing your approach carefully. See how many times the Spikes activate and move accordingly. Press the Lift Button when you exit the corridor and the elevator comes down, board it. There are some shotgun cells near a body in this Lift, as well as a steel pipe.
The elevator platform makes several stops, in which you are attacked by Screamers, Stabbers and Brawlers. After the lift stops for a second time, exit it and enter the lift control room. Grab the shotgun shells and first aid kit, them press the red button on the control panel. Return to the lift.
After the third stop, the lift malfunctions and falls down the shaft a little. Leave it and follow the path, taking the first aid kit along the way. Climb the ladder at the end, then down another ladder. Go down some stairs and turn left, then down yet another ladder and some more stairs.
Go on the walkway, look out for the metal cages that drop, go around them. Soon you slip and fall, hanging to the rail. Follow the onscreen prompts to climb back up. Go through the door that opens at the end of the walkway. Walk on the water/reflective surface, towards the red machine in the center. Turn the wheel on the red apparatus. The room rotates into the grey environment from the reflections. Explore the adjoining chamber.