I think it means the Kerr's trailer, knowing LE went underneath it.
If it meant KW's trailer Kerr wouldn't know where the loud sound emanated from IMO.
"Something hitting a piece of wood real hard" -
From the report it doesn't even sound as if they might be right next door. Don't they know we want all the facts, what time, did it wake them up, was it before EK went out, was it one bang or more..?
If it was a flimsy chipboard internal door being slammed (pure speculation) I don't think it would make that loud of a sound outside, and inside Kerr's home, or even sound like something hitting against wood. I'm imagining someone throwing something heavy like a hammer on top of a wooden object in a shed, or chucking objects around in the shed looking for something. I think there was activity that night in/around the shed because they spotted something there and moved the crime scene tape (link provided recently). If EK put the dressers in the shed (speculation) what evidence would they see? A gouge out of the grass, could have been made anytime. I don't think they were that interested in a couple of $40 dressers anyway. Maybe something like a little hairband, Mariah could have played there, unless it had blood on it. Blood drips? maybe. Little indentations in the ground that show a certain object was put there? A piece of rope or something. (** see below note). It seems that items were flown to Quantico that day or early the next.
The 3D scanners set up Thursday. IMO they are certain by that time Mariah died at home, because Wednesday they said they believed it was a focused incident. If they thought she died at the abandoned house the crime scene would be there. Why would a trial need a 3D scan of the outside of the property? I can see the possibility that at some stage these trailers could be moved and the land redeveloped, and a jury would not be able to do a site visit. But what puzzles me is that this was a scan of the outside, and I don't see how that could have a bearing on what happened inside the trailer. Perhaps it is so that it can be proved a witness who said they saw something could actually see what they saw from their viewpoint, but then I would think the scanners would be set up from their viewpoint, not within the crime scene tape.
Photographs of the property would show just as well that EK left through a certain exit door carrying Mariah and walked to the van. I've read that these 3D scanners are used in trials to build replica models and diagrams but that seems to be a convoluted method if photographs of a patch in the grass could suffice, and whatever he did outside of the trailer doesn't seem to be dependent on or only made possible by the lay of the land or features of the trailer's exterior. I'm beginning to wonder if by setting up the scanners they didn't use them for anything and it was a ploy to get KW thinking they were focusing on a crime scene in the trailer and to start talking.
**
I have a very dodgy search history on my computer. Today's was 'do dead bodies float?' Thank goodness my family knows about my macabre interests. Anyway, the results came back that a corpse in the water sinks as soon as water replaces air in the lungs and stays submerged until the decomposition process makes gases build up which bring it back up to the surface, a process that can take days or weeks. A corpse that lands in the water face first might remain on the surface because air is trapped in the lungs. The reason I searched this is because NG said her body was found face down at the bottom of the creek. I don't know her sources and since it isn't confirmed by an official source I am treating it as a possibility. We don't know what EK knew about dead bodies in water, but if I were to make a guess before I researched it, my guess would be bodies float, what is there to make a slight child get heavy enough to sink. If he thought like me, he wouldn't drive 25 miles, to avoid her turning up in local searches of water, for her then to be spotted on the surface by someone out walking or fishing. It's a bit of a long explanation, but I think he probably would have weighted her down to stop her being seen, as the aim was to keep her body and the evidence forever hidden. So getting back to the shed, I think he was probably turning stuff over in there, in the dark, looking for something heavy to attach to keep her submerged.