Ive seen a lot of evidence of black people not being able to fully prove their innocence and taking a plea deal because they would rather spend 6 months in jail over fighting, with the aid of an incompetent public defender, to avoid a 10 year sentence.
With all the corruption caught on officer body cameras in just the last 5 years (planting drugs, killing innocent people, unnecessary excessive force, death penalty/life sentence convictions overturned, prosecutors caught hiding evidence of innocence, etc)... It is safe to assume that this level of corruption (which is in many cases protected by both qualified immunity and prosecutorial immunity) has been going on for decades, heavily skewing black crime stats with false entries.