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In a nutshell, you will find no justice in America. It is not something "we used to have" because we never had justice.
Innocent minorities or poor (or both) are convicted of crimes all the time; usually because America's prosecutors are morally bankrupt and don't give a damn about guilt or innocence --- only convictions.
We will put a man in prison for a little grass (perhaps planted by police/goons), but a man that steals millions (billions these days) will get kid glove treatment.
We are not a land of law (verses a land of men) --- that has never been true.