So, I don't believe Terri did it, and to me the main suspect is an unrelated stranger, one who wouldn't worry about being recognized because this wasn't his regular area.
It made me curious about the many sightings of Kyron on June 4th and following days. Sure, in cases like this you get hundreds of reports from people whose desire to help (or desire to be famous) has skewed their recollection a tad, and we only get to know about the handful that also talk to the media (which can be both positive - they were really certain! - or negative - they really wanted to get their name in the media!), but here are some of them.
1.
Salmonberry Road - June 5th, afternoon
Truck driver saw a black or grey truck turn from hwy 26 onto Salmonberry road. A boy in the front seat looked out the window and seemed startled.
PRO: Salmonberry Road is way out in the woods. It would be a good place to disappear a victim, while being at a somewhat safe distance from the scene of the crime.
CON: Where was Kyron the day and night of the 4th? The kid being startled could certainly be because Kyron was afraid, but it could also be because in the truck driver's own story, he almost hit the car as it turned onto Salmonberry Road.
2.
Monroe - June 9th
Farmer driving from Junction City (or to Junction City?) is overtaken by a white truck driven by a woman, with a child in the passenger seat that she was trying to keep hidden. The farmer sees them drive onto a dirt road where they meet a man and a woman from another (cranberry-colored) car. Together they grab a shovel and lead the kid away. Some time later the farmer hears a gunshot. Later still, the white truck overtakes him again, this time with the other car, and they drive so recklessly, they end up scraping eachother.
PRO: It's a detailed account. Monroe is at what would be very safe distance from the crime scene, and at a logical point if they drove south.
CON: It's a detailed account. A bit too detailed; it seems unrealistic that all those events were spied by a farmer who was driving the whole time. The descriptions of two women seem to be an attempt to bring both Terri and Dede into the story. The place is a bit difficult to nail down, but it seems to be in a fairly inhabited area, a strange place to kill and bury a child in broad daylight. Also another case of where was Kyron in the time between the abduction and the sighting, though there are more possibilities here. The police claimed this one had been looked into and dismissed.
3.
Linn-Benton Community College - June 10th
A child who could be Kyron was spotted at the graduation ceremony.
PRO: The same state, I guess? There was another, undated sighting in nearby Lebanon.
CON: Everything else. If you abduct a child would you bring it to a public ceremony six days of intense media coverage later?
4.
Goldendale - June 4th
Woman sees a child at the local McDonalds, wearing a cap and glasses.
PRO: It happened on the same day as the abduction.
CON: The woman herself was less than certain; the article is more about her not feeling her tip was even being heard.
I did find this one a bit interesting, since Goldendale seems less obvious than the other places. So I looked into where the abductor could have been going if they were passing that place. And there is one thing. Almost exactly a year earlier, Lindsey Baum was taken by an unknown killer in McCleary WA. In 2017, parts of her body were found on a mountain outside Ellensburg WA. The killer (if they took the direct path) would have gone through and past Seattle, a three hour drive. So I consulted Google Maps for a route from Skyline School to the place where Lindsey was found. And on the shortest and quickest route (244 miles, 4h20m), what do you find almost exactly at the halfway point?
The Goldendale McDonalds.
For a while I entertained the idea of a hitherto unknown Ellensburg Child Killer (an ECK if you will), one who drove to and through a distant, large city, snatched a kid from a more rural or smalltown area, then took them back to Ellensburg. So it was a bit disturbing when I, thinking a killer like that would start close to home, found
Richard "Cody" Haynes, who disappeared from the neighboring city of Kittitas in 2004. But at that point I realized I was being carried away. The Kyron sighting is uncertain at best (and only one among thousands), and it certainly doesn't place him in Ellensburg. Also, if the current suspect in the Lindsey Baum murder turns out to be guilty, it would be highly unlikely to be the kidnapper of Kyron.
I do hope they continue to search the mountain, though, if for nothing else then to find the rest of Lindsey.