One day after Elizabeth Smart stormed out of the trial against her alleged kidnapper, Brian David Mitchell, the 23-year-old returned to court to listen to an expert testify that Mitchell is a paranoid schizophrenic.

“I believe he has a mental illness,” said clinical psychologist Richart DeMier, according to the Salt Lake Tribune.  “I believe he is properly diagnosed as schizophrenia, paranoid type.”

PHOTOS: Elizabeth Smart Leaves Court

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• Brian David Mitchell
• Ed Smart
• Elizabeth Smart
• Lois Smart
• Richart DeMier
• Salt Lake City
• trial
• Wanda Barzee