Gem Warfare by Camilla Chafer

Private investigator Lexi Graves might have bitten off more than she can chew. When her mom calls about a possible case, the last thing Lexi expects is a body buried in a shallow grave. Yet that isn’t the strangest thing about the case. Hidden on the body is a fortune in jewels and a photograph with a face Lexi is sure she knows but can’t quite place.
Who is the man in the grave and why was he buried in the Graves’ quiet neighborhood? When identities become clearer, and the past unravels, Lexi must solve not only the murder and the question of the jewels provenance, but face an old nemesis at last.