Sure I'm familiar with it, I had a case thrown out of court earlier this year because the judge felt the cop had stopped the guy for exactly that, suppressed the evidence and the guilty-but not of what he was allegedly stopped for-client went free.  My point was the expansive nature of your statement is absolutely incorrect, while there certainly are terrible breakdowns and injustices, you do not get tossed into prison for fitting a demographic, at least here in N. California.  You may very well get heightened scrutiny and we can't always defeat that, but you don't head off to Soledad cause you are a 19 yr. old Hispanic with baggy pants.

"I said, 'Wait a minute, Chester, You know I'm a peaceful man...'" Robbie Robertson

Most of the DAN evidence has exonerated people convicted on the basis of eyewitness testimony, often under circumstances where one would think it would be most reliable.  Eyewitness ty is the biggest convictor of innocent people of all forms of evidence-juries seem to place great faith in it, and cops know how to rig the system to give subtle hints leading towards those whom they believe to be guilty.

"I said, 'Wait a minute, Chester, You know I'm a peaceful man...'" Robbie Robertson