I have not played this version but I think the
SOL case was not updated since the last version I played, hence the nuns investigations should remain the same like before. So, just have to search "Delilah", "investigation", "clues" or similar terms (on this game forum thread) to get the answers.
I don't remember them by heart or interested in doing a forum search at the moment
(especially since this questions has been asked so many times before and I myself had answered a few times before too) . Cheers.
P/S: For future reference, just do a search first before posting because most likely it has already been answered before. Unfortunately, there is no walkthrough/guide for this game, and a WT mod is currently being made (huge shoutout to
Sancho) but is not ready for prime time yet.