Racial profiling - it's why, some say, George Zimmerman shot and killed Trayvon Martin.
It's also what some say the New York City police department does every day through its "stop and frisk" policy - a policy which allows police to stop, question and pat down people they believe could be carrying weapons or drugs.
This policy is being challenged in the courts, and the statistics are interesting:
Today, police commissioner Ray Kelly defended his department in an op-ed writing, quote:
"Accusations of racial profiling ignore the fact that violent crime overwhelmingly occurs in minority neighborhoods."
Was George Zimmerman guilty of anything more than what the NYPD does every day?
OutFront: New York City Police Commissioner Ray Kelly.