The man "had no reaction" when state agents explained why they were searching, investigators wrote.
"However, he was very talkative about how he was going to school, wanted to be a pediatrician and was volunteering at Primary Children's [Medical Center]," investigators wrote.
The man then said that "he felt like crap" and "felt as if he had slipped up again," investigators wrote. He said he became "addicted" to child pornography six months to one year before his mission and prefers "young boys six years of age to adult," investigators wrote. He said he told his father and bishop but "had never attended any treatment for his addiction," investigators wrote.
The man said he did not view child pornography while he was on his mission and had no desire to abuse children, investigators wrote.
He told police he had started using peer-to-peer file sharing to download child pornography about two months before police searched his home.
Digital examiners reviewed 34 videos and 500 images of children being sexually exploited, including 109 images containing a child identified by the National Center for Missing and Exploited Children, according to forensic results reported in July, investigators wrote.
The man was charged with 10 second-degree felony counts of sexual exploitation of a minor.