Hall of Justice (U.S. criminal justice datasets)
From the web site: "Hall of Justice, a project of the Sunlight Foundation, is a robust, searchable inventory of publicly available criminal justice datasets and research. While not comprehensive, Hall of Justice contains nearly 10,000 datasets and research documents from all 50 states, the District of Columbia, U.S. territories and the federal government. The data was collected between September 2014 and October 2015. We have tagged datasets so that users can search across the inventory for broad topics, ranging from death in custody to domestic violence to prison population. The inventory incorporates government as well as academic data."