Instead of mind reading, I was instead brainwashed to rehearse certain statements or thoughts in my head, that when sufficiently memorized, Lucy would be able to answer those memorized thoughts.
I was actually speaking when I was thinking of certain things while hypnotized. This means that instead of mind reading, Lucy was simply speaking back to me as I made my thoughts clear.
After Henry was killed, the person who had killed him had left his body there temporarily before returning to that room and locking it on the inside via the door/via a key that was being held by Henry. The killer then climbed to the roof via a window or descended into the bottom floor via a secret passage way, a stair case, rope, ladders, a hole, or whatever exit. Alternatively, the killer hid behind an object in the room we found Henry in (we also could have hidden behind Henry).