This is earned for finding optional collectible #4. If missed on the first run, you can "Play Episodes" and select specific parts of the Episode in order to find the missing optional photos through
collectibles mode. The following collectible is described and can be seen in the video below at 3:22:
Once you go inside the church, look on the table to the left, and take a pin.
Getting all 6 collectibles in this episode will also reward you with the following: