"Vile", "rodent", "being exposed", "disgusting behaviour" - do you really think that your are doing something useful for society by poking in this fraud,? I really do think you have a lot to hide yourself, otherwise you would have moved on long time ago. Yet, you just enjoy smothering in this mud. Now, take a mirror and have a hard honest look at yourself. What do you see? Jealous little man, who enjoys misery of others, so that he can think he is better than his consciousness really indicates.
I don't really care about running performances of those family members, and how they perform in future running events (although I doubt they will publicize their running anytime soon), but I hope they will recover from this shameful incident. No matter how you feel entitled, they do not owe you anything, neither to your pals. Berlin marathon organizers might be entitled to the apology, but that's none of your business, neither how are they going to be treated buy other WMM, or their own running club.
In fact, nothing that has been written about that poor cheater is none of your business. It's his hobby, not yours. If he enjoys his real, or imaginary PRs, it's his business, not yours. Apart from alarming organizers to the fraud, you should not have discussed him here, on foreign website, neither anywhere else publicly.
If I were him, I might consider filing a lawsuit against you, just to teach you a lesson that you should mind your own business.