I know this is really about S3, but someone had been back to the start of S1, either on this thread or the last one. I've just watched the beginning of S1E1, and like PP said, it's there from the start, the call-out for CC and Kirsten to the drunk man in the playground, threatening to set fire to himself. Then a little bit later C and C and little Ryan go to the graveyard and Ryan notices the pens on Sylvia Plath's grave and there's poetry on her gravestone which mentions 'fierce flames' and I think she killed herself, not by setting fire to herself, but it's all there.
And I know Kevin was silly and greedy in a way but it was no fault of his that the damn sack fell and split and he saw the packets of drugs. He just wanted to pretend that he hadn't seen anything but Ashley wouldn't let him and so he changed his mind.