Doubtful. Whites have more wealth and better lawyers.
Oh yes, thousands of murders a year dismissed by clever lawyers! Thousands!
The scarier possibility is "thousands of wrongful convictions due to ineffective representation."
... scarier and hard to discount.
And it is imho better for 9 murderers to walk free and prevent 1 wrongful conviction, than to have 1 wrongful conviction to keep 9 murderers off the streets.