This document discusses three criminal cases: the case of serial killer Cary Stayner who killed 4 women, the case of Bernard Madoff who committed the largest fraud in history, and the case of Andrea Yates who killed all of her children in under an hour. It analyzes these cases using criminal analysis approaches, identifying the types of crimes and whether they were expressive or instrumental. Rational choice theory and strain theory are applied to help understand the motivations and behaviors of Stayner and Yates. Madoff's case is examined in depth using an economic theory lens to understand his massive Ponzi scheme as a white collar crime.