Well, all in all I think we agree the two officers should have at least detained or arrested Wendy. But real world logic doesn't apply to anything cop-related here because no police force in the first world would make those 2 officers also prison guards (the woman says she'll be doing rounds at night). Their job would end by bringing them in, then doing a lot of paperwork and maybe some questioning. But in any case they would stay at the prison hallways for the night. But what's that compared with having a runaway princess locked in your basement.