This is why no knock warrants are bad (although according to one witness the police did announce themselves, neither Walker or Taylor were able to hear them say this). It was just a horrible tragedy that resulted from misunderstandings on both sides (the police believing drugs were being sold from the apartment, and Walker thinking random people were breaking into his apartment), it is not the result of racism or prejudice. There was no murder here, just a case of being in the wrong place at the wrong time.