Bren: In the Dark — Joleene Naylor

Short Story. Not for children. Part of a collection called Tales of the Executioners about the vampires in the elite “police force”. Bren has a simple assignment - to deal with a coven who's killed too many locals. When he takes a victim's phone as a trophy, he becomes fascinated with the story of her death - almost too fascinated.

Can be read as a stand alone.