Disproportionate Minority Contact, or DMC, is a complicated problem. There are no easy or even obvious ways to go about solving it. So we're taking a look at another slice of the problem-- what some refer to as the school to prison pipeline. That's the idea that schools come down too hard on kids, take a law enforcement approach, and rely on arrests to handle routine discipline problems. And many people who came out last week expressed frustrations with school security guards. Some pointed to the prison-like atmosphere that prevails in many of our public schools. But a new approach to violence prevention may be changing that. Joshua Gray heads up the Culture of Calm program underway at some Chicago Public Schools. RELATED:Pursuing a 'Culture of Calm'