Blood ties [#3] : Blood trilogy
(Book)

When a serial killer tortures, dismembers, and dumps eight women in eight weeks in Tennessee and adjacent states, Noah Bishop, head of the FBI's Special Crimes Unit, gets on the case, along with Noah's touch-telepath and seer wife, Miranda, and special agent Hollis Templeton, a profiler-in-training and medium who can self-heal and see auras. Hollis and special investigator Diana Brisco, also a medium and healer, travel to the gray time, a corridor between life and death where a young spirit, Brooke, helps them connect the killings to a past threat.