The police were ordered to lie. The politicians and media work together to hide the extent of Black on White crime, and Black crime in general.
The purpose is to place a moral burden on Whites, to justify taking their hard-earned money.
That has been going on for more than half a century. When there are stories about black crime, it's somehow always been the fault of some evil, white racist. The narrative has been white racists make blacks commit crime. Nothing's changed since I was a kid.
Except now the amount of black crime is being noticed by some conservative talking heads like Bill O'Reilly. But even Pubbie pols are loath to mention the amount of black crime.