From my listening, the KSP detective talks about what the sheriff said after being taken into custody. It is clear the detective is reporting hearsay and did not hear what was said directly. Here is how I heard the quote: "When he was taken into custody, I was told by one of the other officers who was there that he made the comment 'They are trying to kidnap my wife and kid.'"
Detective says no LEO tried to interview the sheriff after arrest. Interesting. Unclear if they just assumed he would lawyer up, were worried about doing something to screw up the eventual conviction (and likely death penalty attempt), or there is some other reason.
Quote about the "kidnapping" starts around the 26 minute mark.
WARNING: THE VIDEO OF THE SHOOTING IS IN THE FIRST PART OF THE LINK.