You’re now in a mental institution to meet the killer from the old Kirsten case. Barney will explain how to get to him. First, head straight all the way to the end to collect a bonus card and then turn back. Go down the first corridor on Carla’s left to meet the guy who will show you Janos’ cell.
Enter to trigger a cutscene. Talk with Janos to get as much information as you can. When you’re finished chatting and checking out the cell (if you wish), head back out and speak with the assistant again.
Just before you’re supposed to leave there will be a power outage and lots of nutcases will be freed. The assistant will disappear. As soon as you get the chance, walk and don’t stop until you get to Barney unless Carla says there’s someone near. Keep her breath under control as before. You need to go up the corridor and then take a left (going up where the first patient you see came from), following the rest straight. Take breaks when she suggests it and only move again when she says it’s safe to do so. She’ll hold her breathe when she needs to as well. It’s pretty easy although you should also note that if you see a guy before she does then you’ve gone the wrong way so turn back and turn off somewhere but it’s pretty easy to find where you’re going!
Eventually the lights will turn on and you’ll be surrounded by maniacs. Just run to the big glass door and Barney will save you.