From Stanford Libraries:
On June 19th 2017, the Stanford Open Policing Project launched its website to provide access to the data collected about police stops around the country and to provide information about research that this data is driving. Stanford Libraries is pleased to be a partner in the long-term preservation of this data, which has been deposited into the Stanford Digital Repository (SDR). The persistent uniform resource locator (PURL) for the “standardized” stop data is archived as a national repository of state patrol stops in the SDR. Putting the files into an institutional repository such as the SDR insures the longevity of access to the data for continued and future use by researchers and journalists alike.
Direct to Stanford Open Policing Project Web Site