He's not going to answer you honestly.
The real reason boils down to "she's black, and thus her life has no value to them". That's literally it. There's nothing more to it. No ameliorating circumstances, no secondary considerations, nothing. She's black and therefore worthless to them, so calling for police reform is unacceptable.
They'll find every reason to not come right out and say that, but that's all their argument boils down to.