There is a lot of twists and turns in their reporting.
As to what KAK said in his 2020 document:
Originally (my understanding) is that when the search warrants were served back in February 2017, the Klines told LE that they were out of town (in Las Vegas) at the time the murders took place. I have NO idea why that was accepted by LE at the time. Having said that- I have my theory
ONLY A THEORY)
LE was likely looking at a certain person , a land owner, at the time that KAK and another were quickly looked at. That can pretty easily be accepted because we were able to see the affidavit/ search warrant that was served in March 2017. It states in that affidavit that the agent requesting the search warrant named that person as a suspect. The Klines fell away from the attention of LE for about 2 years until they made certain that every bit of evidence was combed through and eventually disregarded.
Now- think back to the 2019 presser. This was our "change in direction." DC says later that week that he believed they were on to something VERY EARLY ON.
Well yeah- they could have got these people off the street years ago, but at least some of the LE moved the wrong way. They made some pretty big mistakes.
They knew that once they could rule out the other individual , they had dropped the ball on at least a few things. Apparently, by the time KAK was taken into custody in 2020 , the story about them in Las Vegas was the first of (probably) hundreds of lies told by KAK, This one, they could prove, and so KAK came up with the next lie about going to his Grandparents for a pay per view. Well- a kind of lie- because it looks like he and pops did make it over to Grandma's , but they used that opportunity tp (possibly- likely) destroy evidence.
AMOO
Murder Sheet
https://interactive.wthr.com/pdfs/logan-warrrant.pdf