The Kirilli Matter
(Qavnerian Protectorate #1)
Kristine Kathryn Rusch

When the investigation of a brutal murder scene points to terrifying suspects, Augusta Kirilli must find a way to protect her family’s secrets and discover their meaning.

Set in the world of the Fey, this is a Detective Mystery, but with magic. While it is a stand-alone novel, some knowledge of the Fey series helps, although to some extent it predetermines events.

Most of the book alternates a third person narrative from  the two side of events. And while there is an explanation of the murder, it leaves open more questions than it answers.