The document provides an introduction to criminology and the Philippine criminal justice system. It discusses the distinction between criminology and criminal justice, with criminology focusing on theoretical investigations of crime causation and criminal justice focusing on the legal process. It then describes the five pillars of the Philippine criminal justice system: law enforcement, prosecution, courts, correction, and community. Law enforcement's role is to prevent crime, make arrests, and investigate crimes. The courts judicially determine guilt or innocence. Correction aims to rehabilitate offenders. And the community plays a vital role in crime prevention.