For lawyers on this forum-
There was a theory, even the bus driver talked about it, that the man paid off the woman.
Does this oblige the woman "per law" to inform the police? If she does not, is she an accomplice?
Another question - If the man had disclosed it to their partner/friend, and the partner/friend does not disclose it to the police in a reasonable period, are they an accomplice?
I ask in context of someone protecting their loved ones from a crime the loved one committed, till the police charge the protector as an accomplice. The case that comes to mind is Ian Huntley(?).