Item description:

Click X on the remaining item "Magnifying Glass"
(Cursor already on it)
**View Screenshot If Needed**

!! You Can Continue On With The Game !!

(After the HOS....
go through the door upstairs "To the upper room")

Go into the study and walk up to the bookcase (left of window)

Remove the books
Use the safe combination and the safe parts to access the safe
Turn the dial following the combination to open it
Turn the handle
Take the “Dagger” evidence

Proof Of Crime trophy unlocks