The Chicago link provides a narrow window into that question, and it doesn't look good.
For instance I have a nice painting on the wall that a friend created. There's no paper trail of how I got it. Does that mean I continue to own it only at the pleasure of the police?
I'm less worried about my major assets, but what if someone decided I could have been using my house as a venue to write code that could be used for illegal purposes? Do I have to prove every library on my Github account can only be used for legal purposes or risk having my house and laptop seized?
Is the reason the answers to those questions is "no" merely because I'm white, prominent, and a political donor? How is this different from Putin's Russia? (Aside from in degree.)
I think civil forfeiture has major problems with how it's applied, but it's pretty internally consistent with the rest of the law.
or if the police simply realize they can steal from the blacks ?
Those are two different problems at heart. Of course, it doesn't make much of a difference for the blacks.