While the PPB shows serious  signs of racial discrimination, I don't see that as 'institutional racism' as much as it is fear by the police of being killed in the crossfire while the blacks continue to kill each other over drugs, prostitution and 'disrespect' by other blacks.  

Hard to blame the police of any color when the blacks are killing 6-year old girls in their beds in gang-related drivebys.  

Or to blame the police when the blacks are killing each other outside local strip clubs. 

Unless you are an apologist for criminals, of course.