I listened to this book (Audible.com title) while driving and the trip just flew by. Dr. Stephen Dunbar -- I may get the spellings wrong since I was listening -- is a medical doctor working for SCI-MED a quasi police department in Scotland that appears to have broad police powers and investigates crimes from a scientific perspective. He is called in when a dying serial killer confesses to a crime that another man, Dr. Little, has been convicted of using seemingly incontrovertible DNA evidence. Soon Dunbar discovers several anomalies and a lab that had been charged with sloppy work. The evidence continues to point in Little's direction, however, until some weird things are discovered and the director of the lab is found murdered. Enough said to avoid spoilers. I have to admit to being a sucker for a nice Scottish accent and the reader, Joe Dunlop, does a great job.