“Criminal psychology” is a broad field that overlaps with several subareas of psychology, including correctional (applications to prison settings) and forensic (applications in courtroom settings) psychology. A widely used umbrella term, “psychology-law,” also reflects the interdisciplinary commitment of researchers in criminal psychology, who draw from many traditional domains of psychology, including clinical (e.g., assessment, treatment), social (how people and contexts influence us), cognitive (how we think and make decisions), developmental (how we grow and change), and neuropsychology (the biological basis of behavior). This chapter – covering research in criminal psychology – emphasizes the shared reliance on scientific methods characteristic of modern psychology.