This is the story of NecroSearch, the 32 year old organization assists law enforcement in finding “clandestine graves”, using a mix of methods including decomp dogs, geolophysics, entymology, hydrology, and botany. It’s an older book, and the audiobook has updates as of 2015 (when it was recorded). It’s not terribly engaging, unless you have a particular interest in the subject (which I do, since I’ve worked a little with some cadaver dogs).