(It's been many years since I've been on WS - but this case is so perplexing and sad that I had to comment. My interest and posts are always related to geography and time of crime.)
At the press conference today 11.20.22, LE remarked that they are focused on the area "South of Taylor Avenue to Palouse River Drive" and "West of Highway 95". This area is South of the crime scene.
The following coordinates can be referenced on Google Earth (note: Google Earth, not Google Maps) - just cut and paste in the search bar. I'm only suggesting a possible exit path - I don't know this area at all personally.
To me, the LE reference suggests maybe they believe the perpetrator's path of egress was out the back area of the house (located at 1122 King Rd - 46°43'18.91"N, 117° 0'38.78"W) as opposed to down King Road or East of the house. There are many structures with windows and potential cameras around the King Road house - I'd think the perp would have been aware of that and chose the safest way out. The area with the least visibility seems to be the forested area behind the house. Even though there are fences enclosing adjacent properties, the fences appear to be scalable. The forested area abuts Walenta Drive at various points:
46°43'17.56"N, 117° 0'42.19"W
46°43'17.16"N, 117° 0'40.94"W
46°43'16.63"N, 117° 0'39.97"W
The house located on Walenta at 46°43'17.16"N, 117° 0'39.94"W seems critical to ask if there are cameras. Up the hill from this area about 65 yards is where Walenta Dr. intersects with Ridge Road - from this intersection there is a footpath about 20 yards away (46°43'14.91"N, 117° 0'39.02"W). The path heads South and has several sets of stairs and is about 110 yards long, ending at a cul-de-sac called Shetland Court. This looks like a public access path (not locked) - but I can't find anything online. If it's an open path for walking, could there be evidence in that area (it looks surrounded by trees)? Is it possible the perp could have taken this path and parked a car at the bottom (46°43'12.29"N 117° 0'38.88"W)? My guess is it would have taken less than 10 mins from the crime scene to get to that place. Also Shetland Court leads to Colt Rd, which leads to Conestoga Dr, which leads to Palouse River Drive on the edge of town. Easy exit out of town.
Just a thought!