Kirk Levin, in an interview with law enforcement, admitted that he was the only person who could have killed his mother, Marilyn Schmitt.
In a written statement, Levin stated "I had to have killed my mother. I can't explain why or what I was thinking. I remember walking into her room and choking her."
He also wrote he didn't remember driving to Storm Lake to pick up Jessica Vega, who he is accused of kidnapping.
Levin wrote the statement after an interview where he repeatedly denied killing his mother.