After Killian escaped the dungeon where he'd been kept, he wandered about in the shadows for a bit. He needed to get his bearings before he could devise a plan of action.
He wasn't sure how he had been captured in the first place. There seemed to be large chunks of his memory missing. Specifically, anything to with immediately prior to his capture.
He could not remember where he was prior to his incarceration, why he was there, what he was doing, or how he was seized. He wasn't even sure when he had been captured or how he had been imprisoned. This selective amnesia would have disturbed anyone. But to someone with a photographic memory it was downright terrifying.