The jury in the case of Jamie Rose Bolin was shown Kevin Ray Underwood's video tape confession Thursday, describing how Underwood he lured a 10-year-old-girl into his apartment, killed her and sexually assaulted and mutilated her body.
Underwood could be executed if convicted of murdering Bolin.
Underwood told FBI agents two days after she disappeared from her Purcell, OK home in April 2006 that he hit her over the head with a wooden cutting board while she was watching television and playing with his pet rat.
Agents asked Underwood what the girl said after he hit her.
"That's something that's haunted me forever since it happened," he said. "She started yelling, I'm sorry,' which I'm like, What is she sorry for? She didn't do anything wrong. It's me. I'm the one that should be sorry.'"
Underwood, 28, showed no emotion while the confession was played. One of his attorneys, Matthew Haire, held his head in his hands and looked at the ground.
Prosecution and defense attorneys rested their cases in the trial, which began Monday.
Underwood said he smothered the girl with his hands, sexually assaulted her lifeless body, draped the corpse over the bathtub and began sawing her neck with a decorative dagger, nearly cutting her head off.
He said the killing was part of a fantasy fueled by macabre Internet pornography. He said his plan was to kill and eat his victim.
"It started off as cannibalism ... I wanted to know what it tasted like, and just the thought of eating someone was appealing to me," Underwood told the agents.
After a search of his apartment, investigators found the girl's nude body stuffed into a plastic tub inside Underwood's bedroom closet.
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