The chapter proposes controlled access policies for body camera data modelled on tried-and-true approaches in the health sciences to protect sensitive medical information while permitting research. Controlled access maximizes the benefits of the trove of police videos while minimizing privacy harms. Some states have succumbed to the temptation to exempt body camera videos from disclosure and delete the data if it is not of evidentiary use in a particular case. Yet video evidence is valuable not just for investigation and prosecution in a particular criminal case, or of a particular officer. Rather, aggregated data involving even seemingly uneventful encounters can reveal important insights about how to keep situations from escalating and protect civil rights. Controlled access gives researchers bound by professional ethics and Institutional Review Boards to minimize harms while maximizing societal benefits the ability to analyze highly sensitive data. Privacy planning requires a well-designed plan for the protection of sensitive data and a showing of the capability and facilities to implement those protections. Finally, because data must exist to be analyzed, this chapter also presents findings on varying data retention policies for body camera video.