No. Sociopaths and psychopaths don't behave in a 'rational' manner. Besides, how do you know he is not perturbed? Because of some cartoons he drew? His ranting letter calling for the Prosecutors to be sacked sounds to me like he might be a little perturbed. If I were being publicly accused of murdering a child and I knew I was innocent, I'd be asking to speak to the police in order to give my account and clear my name. I wouldn't be taunting the police that they haven't been able to find any "forensic" evidence yet. If CB is innocent, he could nip all the speculation in the bud by providing an alibi for his whereabouts on the 3rd. It was national news, his phone was pinged in the town that night. If he didn't do it he would have at least have thought about where he was around that time given his proximity to the area, so he would still be able to recount now where he was when this happened. But no, according to his lawyer you could order "a holy drink in hell" before CB would cooperate with the prosecutors.