From first-hand experience of applying his techniques, Canter tells a number of engrossing stories of serious crimes and their detection. He expands on his theories of criminal types, getting deep into the twisted logic of the 'marauders and commuters' - whose confused and lazy attempts to satisfy their brutal desires led to their capture. An in-depth study is also made of those like Fred and Rose West, Marc Dutroux and Dennis Nielsen - who construct 'spiders' webs' and 'black holes', to lure then destroy their victims. Mapping Murder lifts the lid on geographical profiling, explaining how this new approach to solving crimes is changing both the way police work and our understanding of the criminal mind.