how to conduct a risk assessment, what security arrangements to consider, and how to assess what people to interact with in contexts of widespread violence. Chapter 3 focuses on how, and when, to collect (or not) documentary, witness, or forensic information about serious human rights violations. It provides practical guidance on the recognition and proper documentation of hard-copy, digital and photographic video information, how to document and record a crime scene to preserve it, and what steps to take or not to take when confronted with physical injury, loss of life, sexual and gender-based violence, and artifacts such as firearms or other weapons. This Chapter also addresses interactions with victims and witnesses of violence, guiding the reader through various stages of a witness or victim interview, how to recognize and handle trauma, and what special precautions to take when dealing with minors and victims of sexual and gender-based violence. Chapter 4 discusses the importance of proper management of the information collected, how to verify it, how to catalogue and store it, and how to ensure confidentiality of the information collected, with special attention on personal security and the security of the people the unofficial investigator has interacted with in the course of his/her information gathering. In addition to presenting best practices, the Handbook provides the reader with actual tools (such as informed consent and chain of custody forms), and recommends the use of new technology that assists in the investigation and documentation of serious human rights violations. 20