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Open source investigators We live in an age where there is data on almost everything, and a large chunk of it is publicly available. You only need to know where to look. There are many investigators on the internet that are gathering Open Source Intelligence, or OSINT for short, and conduct research and verification, much of it focussed on war zones. The most prominent collective in this field is the NGO Bellingcat, but there is a whole ecosystem of amateur sleuths online. Gareth speaks to Charlotte Godart who leads the volunteer programme at Bellingcat, on how they effectively crowdsource part of their investigations, and we hear from several hobbyists who rose to prominence on Twitter about why they spent much of their free time on this type of research.Data tackling gun violence Brazil has a gun violence issue, and a public data issue. In the Rio de Janeiro metropolitan area, there were, on average, 13 shootings every single day last year, and the only reason we know this is because of open data platform F