I'm thinking that you bring up a good point but it seems to me like Ink snapped relatively recently before the outbreak. He more than likely would have been living a double life up until the point where he committed the murder (that's what most functioning sociopaths do)....that cheating wife seems to have been the catalyst to letting the crazy out. My bet is that if he was crazy on the d/l this whole time, he had a secret 'nest' or hiding place for his occult material. Or he kept it all in his head until he went nuts. Either way, I hadn't thought about it before so I'm glad you brought it up.