Die Again by Tess Gerritsen

Famous taxidermist Leon Gott has been murdered in his home and has three marks on his chest and both sides of his face.  The cuts make Boston detective Jane Rizzoli and medical examiner Maura Isles believe that they might be dealing with some sort of ritual killing. Could the death be connected with the disappearance of Gott's son, Elliot, six years ago on a safari in Botswana or was Leon Gott killed by an animal rights activist?  Rizzoli and Isles will immerse themselves in DNA analysis and forensics in order to find who's responsible.