Hey, hey, hey now. Relax guys. While America is FAR from perfect, you really shouldn't condemn a nation because of the actions of a few people. Remember, this is the media we are getting the information from.
Just to play devil's advocate since there is nobody else argueing the other side, I will speak up in defense.
We don't have the entire story. Sure the kid says it is just a story, but apparently there is something else going on with the kid if the family's first reaction is to call the police. All we have heard is that the grandparents found the story, called the police, and the kid saying that it was just a story. In the links I did not see anything saying the grand parent's rational for calling the police right away or the reason the police are thinking about prosecuting. Perhaps the kid has been in previous trobule. Maybe he has past violent behavior. Maybe he is on medication. We need both sides.
Don't condemn our legal system. The police are required to take these claims seriously, especially in cases of sexual assualt and terroisim. Because they are required to do so, they must investigate, gather evidence, and prosecute if they have the evidence to do so or if they feel the kid is a threat. Apparently they feel the kid is a threat. We don't know. The media and everyone has jumped on the kid's side.
I don't have enough information, but if he is tried in Juvinile court, he might simply be required to see a theripist. If tried in "regular" court, I can easily see the essay not being admissiable due to an illegal search. I just find it funny you guys are yelling at the stupidity of americans because some people aparently jumped the gun, yet you guys are jumping the gun before knowing all the facts.