In madness there is a look out tower. Go up it and u will have to climb down but don't drop or you will die. Climb to the other side and there will be a sniper and a switch. Flip thed switch and kill every one with either the sniper rifle or with psi-powers. Aim your TK at the top of the building and lock on to the key. Pull it to you, then climb down and go to the outhouse on your left. Open it and there is a shot gun.