Evidently if the perp gets rid of a source of incriminating fibers some don't want to accept that fibers similar to each other tie a suspect to a victim
Re: Planned trip
I wonder why DW himself (once again some are loathe to understand why he would tell the police certain things) told the police it was a spur of the moment trip?
A trip somewhere, could generally have been talked about for that weekend, but any actual destination plans, or travel itinerary may have been strictly a "spur of the moment" thing. It's a possibility, anyway, IMO.