Claiming bias because a far greater percentage of blacks are in prison is akin to charging doctors with bias due to the far greater infection rate of STIs among homosexuals.
One issue nobody talks about is the fact that blacks tend to use crappy attorneys or no attorney at all. Police know it and naturally go for that low hanging fruit.
It was a cop who told me that. He also said its why you never see court officers or attorneys in jail. They know the game and play it well.