Most of this thread has become pure speculation.
Whether you read The Sun or loathe The Sun, watch BBC or hate BBC, trust the police or not, believe people have mental health or not, posters are doing nothing more than speculating and posting links to news stories that are not doing much better.
Let everything take it's course. For the accused to get better, if you believe he is ill, so he can explain himself. Let the BBC or police or The Sun offer more information or withdraw information and apologise, Maybe the victims, parents, lawyers will make more statements.
There will be more reporting on this and the bigger, or smaller, picture will be on hand. Until then, petty and political comments are inane.