Twisted Vine by Toby Neal (A Lei Crime Novel)

The island of Oahu is skyscrapers and rainforests, beaches and boutiques-instead, Special Agent Lei Texeira is drawn into a shadow world connected by death and the Internet. Mysterious suicides draw Lei and her team, including tech specialist Sophie Ang, to hunt a criminal who plays with the thin gray line between right and wrong. Lei stirs up a hornet's nest on the investigation as her past reaches out in a twisted vine of old loves, new technologies and dark vendettas.