Yes, she was at the house, but had gone inside over those minutes during which William went missing.
Reading these lasts updates from police reports, I also really feel for the police and others involved in the search.
They must all be under enormous pressure and feel great scrutiny upon them, with increasing amounts of people attuned to this story and constantly wondering about and asking for updates.
They really want to find William and they are increasingly using language that gives an insight into their own predicament - like baffling, absolutely bewildering.
It must be sooo frustrating for them that, with all their know how, resources and equipment etc, they keep drawing a blank.