Hi! So I am a mostly new DM (I've DMed one shortish D&D campaign years ago) and just started DMing COS for some friends and my wife.

It is my wife's first D&D campaign. She has played some Monster of the Week sessions I DMed a couple years ago and loved the mystery solving elements of it. She is currently playing an Hercule Poirot type character and wants to solve some mysteries. Interviewing people, looking for evidence, you know, some real Agatha Christie type stuff.

What are some good parts of the module to play up/morph into mini whodunit type mysteries for her? The obvious one for me is figuring out who stole the bones of St Andral, but I was wondering if there were other places I could insert some Hercule Poirot style deductions/looking for ideas on how to do it.