Asked what sentence would satisfy her, Pam says, "To make sure he spends the rest of his life behind bars. To make sure he never gets out, to make sure there's absolutely no possibility of parole. And to make sure he has no communication whatsoever with children."
Devlin was charged with 80 counts of sexual assault, kidnapping and attempted murder.
Pam says it was "horrible" seeing Devlin. "To be in that courtroom and to see him walk in, I was just furious. I was angry. You know, every ounce of me wanted just to get to him."
But in a surprise move, Devlin changed his plea to guilty, avoiding a trial, after prosecutors revealed they had found videotapes and photos of him abusing Shawn in the apartment.
"That was a big thing off my shoulders. I really didn't want to get up there and testify," Shawn says.
Before Devlin was sentenced, Pam and Craig shared with the judge the pain of losing their son for so many years, and pleaded for a lengthy sentence.
Devlin declined to speak, and was sentenced on multiple counts to 72 life terms, and an additional 170 years in prison for his crimes. "The only thing I will say, Mr. Devlin, is that you heaped unimaginable heartache on a lot of people in this case, not the least of which was the children involved," the judge told him. "You will have plenty of time to think about this while you spend the rest of your life in the penitentiary."
With the legal proceedings behind him, Shawn can begin a new life. "I've lived two lives. I had to start over again from when I was kidnapped. 'Cause it was a different life. That life is gone, so I'm picking up this life again. And I've got what I wanted most in life, was to be back with my family," he says.
Shawn, now 17, is getting back to his childhood passion, motocross, catching up with his old friends, and going to school for the first time since fifth grade. "It was different getting back into the swing of school. But I caught onto it quick," he says.
Remarkably, in just a year and a half, Shawn has caught up to his peers. He'll graduate from high school next spring.
As for any lingering resentment, Shawn says he's too busy now thinking about the good things in life.
"You know what? You're not the person I expected to meet…I was expecting to meet a young man who was very angry. Who was raging inside. No one would blame you," Roberts remarks.
"I've never really been an angry person," Shawn says.
Asked how he puts this ordeal behind without being angry, Shawn says, "Well, at every end of a dark tunnel there's always a bright light, you know?"
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Ben Ownby is starting fresh too. He started high school last fall. He says he has no anxiety about high school. "I just have to figure out how to get around. It's a maze."
Shawn and his parents say that therapy is helping them come to terms with an experience they will carry with them forever. "It's always gonna be with me. I mean, that's something that I've learned. That's something I've come to cope with," Shawn says.
"From what I understand, from your parents, there's some things that you haven't shared with them. Is that to protect them?" Roberts.
"In some ways, yeah. Then in other ways, I'm just not ready," Shawn admits.
For now, Shawn and his parents are just enjoying life together as a family.
"It's kind of a new normalcy for us. And we're just so fortunate to be in this position. So fortunate to have our son back," Craig says.
For Pam and Craig, there's only one way to explain Shawn's astonishing rescue and return.
Asked if her son is the Missouri miracle, Pam says, "I believe so. I do believe miracles happen and I do believe that it was a miracle that brought Shawn home."
The FBI says an investigation found no link between Michael Devlin and any other kidnapping or abuse cases.
The Shawn Hornbeck Foundation is working to help find other missing and abducted children.
Produced by Katherine Davis, Clare Friedland, Mead Stone, and Chris O'Connell