Got you covered! They use FBI data for reported crimes as well as BJS data which interviews people and ask them if they have been the victim of a crime. It's

Got you covered! They use FBI data for reported crimes as well as BJS data which interviews people and ask them if they have been the victim of a crime. It's probably worth taking a minute or two to read their short explanation as I think it is not what people are assuming. https://news.ycombinator.com/item?id=45588459 https://news.ycombinator.com/item?id=45588459