Thank your brother.
I heard a great quote the other day from David Milch, former writer for NYPD Blue:
"Cops are asked to shield society from certain of its most fundamental contradictions".
I thought that was so profound, so succinct and almost elegant.
The stop and frisk issue is a perfect example - Society must decide between liberty and safety but lacks the courage to make the decision. So they ask the police to step into that void and suffer their ire no matter how they carry out their task. The police have only two options here - be blamed for crime increasing or be blamed for declaring open season on black youth. There is almost no gray area at all because society at large can't make the decision.