Sorry, late to this thread and it's almost certainly been posted already, but there are alarming similarities to Tina Sharp's murder - not saying it's the Dad (although that's a mighty weird post) but I don't think it's a random attack by a stranger. I'm also surprised it's not higher up in the media - Alice Gross's disappearance was headline news from the start. Even if the family were known to the police and Rebecca's disappearance is not as out of character as first believed, the police at least appear to be taking this very seriously with the house searches etc. I think (hope) they know more and are possibly relying on the perp (assuming there is one and she hasn't just run away) inadvertently revealing himself. JMO