Considered the definitive work on sex-related homicide, this second edition details the theoretical and psychological basis for sexual homicide and offers practical investigative checklists and directions for processing and interpreting the crime scene. A comprehensive discussion of sexual deviance, it analyzes the typology of offenders to determine their signature aspects. It introduces the latest information on DNA technology, includes a new chapter on the infamous 30-year BTK investigation, offers new research developed from the Working Group of Human Asphyxia (WGHA), and provides a revised chapter on criminal personality profiling and investigative analysis. The new edition contains nearly 400 color photos.