I agree, having watched the whole thing now, that GM appears to be revelling in the attention. I understand from a clip in the film that he had been filmed before in his work role so he want averse to a bit of attention. In fact his whole family didn't come across well imho. His mother, who said 'he saves peoples lives and this is how they repay him' - quite possibly the strangest comment anyone has made in this whole thing. His sister who seemed to also enjoy her time in the spotlight. She was the one who first said KM sedated the kids with Calpol. None of this means he had anything to do with it though. The PJ focused their attention on KM as the perp due to the dog alerts.