"They are not criminally accountable and can't be prosecuted," -
chief detective Frank Hellwig

Is this the same as they will not be 'punished' in any way?

I'm assuming, rightly or wrongly as I know little about German Child Care legislation (maybe Wolfgang could elaborate), that they will be subject to the authority of the equivalent of social work/child care agencies instead of the law enforcement agencies.

I'm also assuming that Germany subscribes to the international treaty for children's rights, under which children can't be "punished" in the same way as adults.