Hi! Thank you for playing my game!
All six pieces of paper can be collected without talking to anyone but the police officer. They are all inside the house.
You can't ask neither Thomas Brickman nor victim's wife about the getting out of the house. But it is one of the clues which are needed for accusation.
Closet door opens from dialogues after finding all pieces of paper and something else. Did you find something in the daughter's room?