No no. The whole point of racial equality is all races are equal. This means all laws and judgements apply equally to all races. Either a word is offensive or it is not. It is not offensive just because someone of a different race says it.
I know where Sonny is coming from black people have taken ownership of the word, it's not as simple as the C word being offensive.
But the point of this case is that a black police officer thinks the word is offensive whoever says it, I think this would require a blanket approach that if a black person posted the same lyrics on social media they would get screwed as well.
Either way, it's still very stupid.