While I do not think that having Asperger's Disorder should make the headlines, it is something to consider, and I say that as someone who does have legal expertise. We do not know any circumstances, and given the nature of the disorder, it cannot be outruled that he was doli incapax. Some people with the syndrome, especially those who operate in absolutely no direct social environment, can be easily manipulated, especially if they have a certain talent. It is not out of the ordinary that even neurotypical people get fixated over something, because they get recognition for it, something that is denied to them in their "real" life, and at one point or another, any human being craves, and it is imaginable that a human being with a mental disorder that isolates him or her from the rest of society is easily exploitable in this regard. It is not an excuse, but I think being on the autism spectrum can severely add up to a bigger picture that, in the end, is not worthy of criminal punishment.