The husband returned fire and the woman called 911. Sheriff's deputies found one suspect dead in the field and the other inside the stolen pickup truck. No one else was hurt.
Much of the roads leading up to the home are dirt or gravel. Brown said authorities do not know why the teens came to that house.
"Unfortunately, the answers to those questions died when they did, because we don't have a clue why they were out there in that area," Brown said. "It's beyond me why they would be that far out other than they were looking to take something, or do harm."
Palmer said Chaffin and King were identified through photographs and because King had distinctive tattoos on the webbing of his fingers.
The teens lived about a mile apart in Bethel Acres but authorities had no idea the two were together when Chaffin was reported missing, Palmer said, adding that King was not reported missing.
"We didn't actually know there was a second one until we got the call from Ellis County, Texas, that two suspects were killed," Palmer said.
Chaffin's father, Roland Chaffin, told The Oklahoman that his son had never been in trouble with the law and had no family problems before he ran away.
"Kenneth was a follower, not a leader. That's what we figure. He followed someone and got in over his head," Roland Chaffin said. Phone calls to the teens' families by The Associated Press were not answered.
Palmer said Wednesday that Kenneth Chaffin had taken nine handguns, six rifles and two shotguns from his parents' home.
"My son's not an angel. I'm not saying that he is," Roland Chaffin told the newspaper. "But the Kenneth we know was not capable of this."