When the investigators told Mitchell what he was being accused of during the 2003 interview, his response was defiance. He told detectives Smart had had a "glorious experience" with him.
"You're under arrest for aggravated kidnapping because the girl told us you took her, against her will, out of her house, at knife point," Parks tells Mitchell during the interview. "You're under arrest for aggravated sexual abuse on a minor ... both of these charges carry life in prison."
"You want to accuse me of being some diabolical, evil criminal and I'm a servant of the Lord and I believe what I've been commanded to do," Mitchell says.
"So God commanded you to go into the Smart home and take her?"
"She's had a glorious experience," Mitchell says.
"A glorious experience with you?" one of the investigators responds.
At one point Mitchell tries to explain the relationship he believed he had with Smart, who was just 14 years old when she was taken at knifepoint from her bed in the middle of the night on June 5, 2002.
"I didn't marry her but she served me as a wife," he said.
"She served you as a wife? Did you have sexual intercourse with her?" one of the investigators asks.
"That's a very personal, private question," Mitchell says.
Mitchell had been originally declared unfit to stand trial in state court by reason of insanity in two separate evaluations, until Smart took the stand for the first time and recounted her "nine months of hell" with Mitchell and his wife Wanda Barzee.
On Oct. 1, 2009, during Mitchell's 10-day competency hearing, Smart testified that her abductor was "articulate, manipulative," as well as "not religious," and "not close to God."
U.S. District Judge Dale Kimball ruled on March 1, 2010, that Mitchell was competent to stand trial.
"The evidence proves that Mitchell has the capacity to assist his counsel in his defense and the ability to behave appropriately in the courtroom," Kimball wrote in his 149-page ruling issued in response to Mitchell's competency hearing.
During Mitchell's trial, Smart told the court that he held a knife to her throat, took her to an encampment near Salt Lake City, pronounced her to his wife Wanda Barzee, and raped her.
Smart also testified that Mitchell raped her repeatedly, forced her to view pornography, drink alcohol and watch him and Barzee engage in sexual activity.
"I felt like because [of] what he had done to me that I was marked, that I wasn't clean, wasn't pure, wasn't worth the same," she testified. "I felt like another person would never love me."
Smart called Mitchell selfish and a "hypocrite" who raped her at every chance he got even while proclaiming himself to be God's servant.
After a nine-month search that attracted extensive national coverage, Smart was rescued in 2003 when she was walking in a suburb of Salt Lake City with Mitchell and Barzee.
Barzee, 65, was sentenced in May 2010 to 15 years after she pleaded guilty to conspiracy to commit kidnapping.