Fiona Frost: Order of the Black Moon

Young Adult mystery series. Fiona receives a disturbing call about a ritualistic homicide in the abyss of a cave and sanctuary of a teenage vampire cult. She is forced to confront yet another obstacle as she is hunted by a crazed escaped convict, bloodthirsty for revenge on her father. Conflict, betrayal, and forbidden love flourish as Fiona realizes that her forensic training program is more like reality than she ever imagined.