A judge ruled Tuesday that Brian Mitchell, 51, is. Last year, the judge ruled Mitchell's wife, Wanda Barzee, was not competent to stand trial either.
Mitchell is accused of kidnapping then 14-year-old Elizabeth from her bedroom in 2002, sexually assaulting her and keeping her as his second wife until she was found nine months later.
Mitchell and Barzee, 59, were charged with kidnapping, aggravated sexual assault, aggravated burglary and attempted aggravated kidnapping. He also was charged in the attempted abduction of Elizabeth's cousin. Barzee has filed for divorce.
On Tuesday, the judge ordered Mitchell to a state hospital until he is able to stand trial. During the competency hearings, Mitchell shouted biblical verses and sang religious hymns.
On The Early Show Wednesday, Ed Smart
"I thought," Smart said, "he probably would be found competent because, as the judge has mentioned, she thinks he understands (what he did and what's going on), but the issue is much deeper than that, which I would agree with her on. When you think that he was willing to sever his family ties, and to just be as extreme as he has been, I just don't see any change happening."