Introduction Math significantly aids the criminal-justice system in catching criminals and “cracking down” on crime. In Patterns, Prevention, and Geometry of Crime by Martin Andresen and J. Bryan Kinney addresses how math does so in ten different studies, with each one focusing on using either patterns or geometry to prevent crime. The studies address the geometry of crime, crime patterns, and “crime generators” and “crime attractors.” Using math, criminal-justice professionals can take the patterns and geometry of crimes committed to create preventative techniques, to understand why criminals pick certain places and what led to those decisions, which includes six different methods, and how all that information fits together. Mobility Polygons One way to investigate the geometry of co-offending is by utilizing mobility polygons. Mobility polygons take all locations in a crime incident into account, including the where the crime occurred...