They could be buying their drugs from your child, the dealer. Comes from a strong family. Family has a clearly stated policy toward drug use. Child has strong religious convictions. Child is an independent thinker, not easily swayed by peer pressure.
Parents know the child's friends and their parents.
Child is productive and pursues many interests. Child has a good secure feeling of self. Parents have set good example. As that child sits at my knee, I must live respnonsibly. Daddy, mold me.