It came from the elevator shaft.

Daddy, daddy, look at the fish! That would be very nice. We've been waiting for you. I can't leave the kids right now. You don't like to think about it, but it… Oh, Mike? But I have it recorded on time lapse cam… Yeah, they said they were headed for the… Ann, I'm booked solid on the dives. How will we know she's got her? Could change into any one of them at any… And he's choking her while he enters her… Oh, come on, hon. You don't trust me? We're up checking around his place.