Stopping for Directions: Awaken the Next Generation

Earlier this week, as I walked out of a coffee shop I noticed a young child racing toward the intersection and in the distance a mother shouting for the child to stop. Judging by the childs speed and the mothers lack thereof, I decided I should start after the child. I caught the childs arm right before he darted out into the intersection. Who is at fault in this situation? If I were to tell you the age of the child youd probably levy the blame toward the parentbut the older the child gets the more the guilt would shift toward the child because he should know better.