I'm just reading some kind of german blog. I'm not sure if i am allowed to post the link, because it's no official report etc..
In principle the "blogger" is referring on a book of german profiler Alexander Horn, called „Die Logik der Tat: Erkenntnisse eines Profilers“, that picks up the MN case either.
The blogger quoted about 4 years ago, that some of the material on MN's hard drives that have been confiscated have contained footage of tied up young boys that have been buried up to the head in the sand.
Unfortuneatly i don't find any official press report about it. If that turns out as true, i would like to see some remarkable similarity to the neuwegersleben report, where dogs had been found, buried in Sand with the heads sticking out of it.
Does anybody knows, if there had been reports about that kind of footage related to MN?
PS: I bought that book and will take a closer look! Should arrive in the next days.