Are you a parent? I guess you won't be telling the stories you are telling now if it happened to be your own daughter. The man deserves to do his time in jail and perhaps even more.
This seems to be a man who knew how to play his game and still manage to be a decent looking neighbour. What he did was heineous to those innocent and undeserving children. He deserves a more severe punishment. He is lucky to do only three years jail term. I believe this kind of behivour is happening all over the world, but it is not an execuse for anyone not to be punished if caught.
