As we construct the Jail Booking Log each day, we track the number of individuals booked, the number and types of charges for each individual, the demographics of the individuals booked, the types of arrests (warrant, mittimus, or other), and the agencies that made the arrests. For three years now, we’ve compiled this data and compared it to previous years. Caveats about the data and information about the limitations of our analysis can be found at the end of the article.