Detachment Fault

After Jorge Desierto's bound body is discovered in the Sea of Cortez, a young American flamenco dancer, Carla Zorya, disappears during police interrogation in Sonoyta, Mexico. Two weeks later, in Tucson, Carla's doppelganger, community-college student Angelisa Corday, is murdered in the school amphitheater. On Angelisa's finger is a rare alexandrite ring - perhaps the very one Carla wore when she went missing. The next day, chemistry professor Hector Ortiz dies when a bomb goes off in his office. And Frankie finds herself in a shadow war with unwritten rules and unknown foes.
Jorge was the brother of the MacFarlane family's longtime fishing guide; Carla, the girlfriend of Frankie's brother, Jamie. But when the Tucson murder victims turn out to be Frankie's colleague and a favorite student, Frankie joins the hunt for the killers, bringing her geologist's eye and analytical skills to aid two old friends - sheriff's detective Toni Navarro and private investigator Philo Dane.
As the search unfolds, Frankie ventures into an elite fringe world where the antiquities trade slips too easily into international money-laundering and far higher stakes.