Citizen-generated videos have become an integral piece of countless important news stories, but they represent only the first tier of open-source materials available to investigative storytellers. With a Wi-Fi connection and the right know how, a wealth of information, including emergency audio recordings, documents, CCTV footage, satellite imagery, and flight and shipping traffic, can be unlocked. Visual forensics involves not just knowing what’s available and where to find it, but most crucial…