Bullworth ! An almost peaceful town. That's what you believe. But actually there are many clues that can be frightening. Here's what can be found... Just be careful, there are a lot of spoilers. I'll try to take some pictures soon.
First, at the funfair, in the Freak Show specifically, when you look at the room where is the Skeleton Man, in the background you can see a picture. What's on it ? Two parents, with a child. But the child really looks weird. Look at his fingers... Isn't it enough ? Good, let's continue. In the Happy Volts Asylum. When you enter, just take a time to look at the pictures that hang on the wall. Did you notice this Alien standing next to... Dr. Watts ? What's he doing here, this crazy chemistry teacher ? Now, go further. You arrive in the "Main Room". Now on you right you have "Block B" and on your left "Block C". You'll notice that in front of the door from "Block B" there's a marker. That means that you can use this door like any other one. But if you look at the door to "Block C", there's no marker. In fact, you must punch the door to open it. What does this mean ? That even the staff doesn't go there ? That it is a high security Block ? Anyway, let's go further. If you explore, you'll find some X-Rays on a wall. Look at them carefully. Have you ever seen a 35 centimeter neck ? Oh, you'll probably notice the X-Ray on the floor too. Have you ever seen a skull like this ? Except on aliens, never. Now, look at the whole room. What can you see ? A biology skeleton. Funny ? Approach more. Doesn't it look weird ? Like an... Alien again ? Anyway, I haven't explored all Block C yet, but I'm sure there are other strange clues, related to convicts or other things...