This chapter of the Outlast II guide is a complete walkthrough for the stage called St. Sybil Administration. Here, you can find hints that will help you complete it. Moreover, recordings and notes that have to be recorded with the camcorder as well as the location of batteries and bandages, which are integral part of the gameplay, are listed in this section.
Having exited the locker, go straight on. All rooms, apart from the corridor on the right, are unavailable. At the end of the side corridor, you can enter the bathroom but there is nothing interesting there. Instead, turn left and go inside the first room on the right.
Once there, interact with the computer  to continue the quest. There's nothing interesting in the opposite room but there's a battery in the second room on the left .
Move towards the toilet and turn right. The door should be open now. You will see some odd cracks on the walls and the image will be distorted. Stop and record the corridor and Jessica (A Sickness in St. Sybil #11) standing at the end of it. Then go straight on. Light will be on in the fourth room on the right. Go there and take the battery. There is a bandage in the opposite room. The next room on the right also contains a battery. Finally, go in the direction where you saw the child.
The exit way is inaccessible. Go straight on down the corridor. In the first room on the right, you will find a piece of paper with a gallows drawn on it. Move further down the corridor and turn left. All there is left to do is to enter the ventilation shaft.
Then, you will have to watch a rather long film cutscene.