First: I don't think you can claim that without also doing some very rigorous statistics. I'm not asking you to, but if you're going to base policy on that statement rather than merely arguing on the internet, you'd need to.

Second: even if you do, you're going to have a hard time controlling for the fact that the police and criminal justice system has a long history of disproportionately enforcing the law against people of color. The base data about who commits crimes, gets convicted, etc. for well over a hundred years is going to reflect this bias.

I'm not claiming to have done my homework here either, same disclaimer applies. I suspect you could find somebody who does study this if you wanted to look.

All of the above assumes we're discussing the US, btw.