"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. Authorities didn't know why the teens ended up in Maypearl.
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.
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."
Associated Press writers Justin Juozapavicius in Tulsa, Okla., Ken Miller in Oklahoma City, and Jill Bleed in Little Rock, Ark., contributed to this report.