It's an old problem and an old code — "don't snitch." And it exists everywhere.
But in Chicago, where homicides and shootings are up significantly this year, that old code is leaving a rising number of violent crimes unsolved. Chicago Police Department statistics show arrests are being made in about 30 percent of shooting homicides, while close to 80 percent of nonfatal shootings are going unsolved.
When police can't find and arrest the perpetrators, they worry that the shooters will soon shoot again.
Read the full NPR story.