This report provides a comprehensive analysis of crime scene investigation procedures, drawing upon the provided scenario of a homicide case in West London. It begins by outlining the initial steps taken by the first responders, including securing the scene and identifying the victim. The report then delves into the investigation procedures, including the roles of different officers, evidence collection, and the importance of preserving the crime scene. It explores the principles of investigation, emphasizing the need for transparency, adherence to legal guidelines, and the importance of a pre-arrest and post-arrest investigation. The report also analyzes case analysis, examining how the police officer gets to know about the crime, how they collect the evidence, and the importance of the investigation procedure. It highlights the challenges faced in homicide cases, the importance of the medical examiner, and the guidelines for searching a crime scene. Finally, the report discusses the legislation, guidelines, and principles that govern crime scene investigations, emphasizing the importance of integrity and the correct handling of evidence. This report is designed to inform students about the complex processes and legal frameworks involved in crime scene investigation.