After reading the KTBS and find a grave reports (the other one required registration) I have a few questions about this.
Why did they send Game and Fish agents to serve the warrant rather than the normal Deputies or State police? This is a little strange.
In the OP you say that they approached him from the disputed strip but the article says they met on private property adjoining his homesite. This is a strange way to say that they were on the disputed property.
The Find a Grave site says he has been known to fire shots at people on the disputed property. With that history I would say they needed to be extra careful. Since he was shot with a rifle they were expecting him to pull his guns and had someone away from them as a backup.
As for aclling him up and saying how about come in and work this out; I would say that would be met with a KMA and shove it. He has already to have it survey done to prove it was his property.
As for his OC I didn't see where anyone made a deal out of it other than he had always worn them and used them. This probably could have been handled better but looks like it was planned out and unfortunately it appears to me that they got the result they were expecting. A lot more info in needed before making a decision on this but it doesn't sound good for anyone.