One to Watch by Rachel Amphlett

Sophie Whittaker shared a terrifying secret. Hours later, she was dead. Detective Kay Hunter and her colleagues are shocked by the vicious murder of a teenage girl at a private party in the Kentish countryside. A tangled web of dark secrets is exposed as twisted motives point to a history of greed and corruption within the tight-knit community. Confronted by a growing number of suspects and her own enemies who are waging a vendetta against her, Kay makes a shocking discovery that will make her question her trust in everyone she knows. One to Watch is a gripping murder mystery thriller, and the third in the Detective Kay Hunter series