And what would happen if they learn that they are under arrest for the murder of a wife and children that they can't even remember?
Such is the situation that Max Hope finds himself in, in this debut novel from Dean Moynihan.
However, the police are struggling. They can't establish a motive for the murders, the investigation is, at best, somewhat dubious and the defence lawyer is not especially good.
Whilst convalescing from his head injury with the assistance of a psychologist Max tries to regain as many of his memories as he can. And also to learn if and why he committed the murders of his family.
With each session of counselling he learns more of his past, but he finds out that perhaps this knowledge might not be what he was expecting or actually wanting.
Was he really what he appeared to the outside world, a successful family man? Or was there more to it than that?
Were the successes more apparent than real? Were the truths of his life more lies than truths? More paranoid than rational?
What happens to Max when he remembers everything? What happens when you really and truly are Finally Woken?
This is a very vivid and haunting debut novel.
It's published by The Book Guild at £9.99 in hardback.