@Walter Hinteler,
Spiegel-tv will broadcast a film tonight (the conten of it is pushlished at spiegel-online
here).
David S. had been a member of a chat group about playing Counter-Strike. He bacame a member, because someone from his school, who was already a member, thought, David had no friends ... .
However, he wasn't liked at all in that group, too, due to his extreme nationalistic and xenophobic speech. His chat-names were "Amok" and "Hate".
David S. left the group in winter - all had complaint that he shot his friends in the games, even used programs killing his co-players already at the beginning of the plays.