This document provides an overview of investigative journalism. It defines investigative journalism as gathering in-depth data on matters that have been kept secret from the public, which could potentially harm them. Interpretative journalism involves extensively analyzing and explaining investigative findings to help the public understand why information was concealed and its potential impacts. The document discusses the importance of investigative reporting in serving the public interest by uncovering secrets that may affect people's health, finances or other concerns. It also outlines key traits of investigative journalists and guidelines for properly investigating stories, conducting interviews, and writing investigative reports.