Yes that was strange.... But I assume people from the school and the police were searching for Louis, he appeared in the paper when he was missing.
Not everything has to be explicit in a story, but I agree this subject should have been clearer for coherence/realism.
I think it's very interesting when the reader has to put pieces together in order to undertand certain details, when some things are implicit, especially in more mature stories... But I do agree with the points/criticism you were mentioning.
It hink this story is somewhat forced. Not all of the details are well thought and some results don t seem natural but rather imposed on us.
Like how they went berserk when the bunny was kidnapped and nobody went to search for Louis.