The Silent Girl by Tess Gerritsen

Boston cop Jane Rizzoli and her partner, Barry Frost are called to Chinatown, where they find a woman's severed hand, with her body nearby. The next morning, while performing the autopsy, medical examiner Maura Isles finds two gray hairs on the deceased, which turn out not to be human hair. The murder seems to be connected to the Red Phoenix massacre of almost twenty years ago, named after the restaurant that once occupied the site where the new body was found. The cook at the restaurant, Wu Weimin, killed four people before committing suicide. Jane and Frost decide to take another look at the old case to try and find a possible link. What they find is a connection to the mob, missing children, glimpses of a mysterious creature, and the possibility that Wu Weimin was innocent. In The Silent Girl, Gerritsen combines Chinese mysticism along with a fast-paced story.