comprehensive and public data system on police violence, particularly because this data shows, again, how much people of certain races and ethnicities are affected dispro participation natalie by that violence. my colleague broke down the study and found researchers looked at a 20-year period in the u.s. and determined more than half of all deaths found due to be by police violence are miss classified in a public database where they can be accessed publicly. the mortality rate over the two decades was three and a half times higher than the black population and 1.8% higher for hispanics. it is commonly understood that particular database undercounts deaths for one reason is that death certificates don't always note police involvement. the bottom line there isn't a single source of comprehensive data by force for police or