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Brian David Mitchell's defense team wants to elicit testimony from a man convicted of marrying his 13-year-old daughter to a 47-year-old man during a 1993 ceremony in American Fork.

John Perry Chaney, who is serving up to life at the Utah State Prison for abetting in the rape of his daughter, is slated to testify Wednesday, according to documents filed this week in U.S. District Court.

Chaney, now 54, was convicted during a 1997 jury trial in Provo's 4th District Court.

Court documents do not specify what Chaney is expected to say on behalf of the defense.

According to news stories, Chaney had, himself, married and impregnated a 14-year-old girl.

Mitchell, 57, is on trial for allegedly kidnapping then-14-year-old Elizabeth Smart from her Federal Heights home in 2002.

The self-proclaimed prophet then took the girl as a plural wife and allegedly raped her almost daily for the next nine months, which included a trip to California.

The defense was in the middle of presenting their case when the trial, which began Nov. 1, broke for the Thanksgiving holiday. Testimony is to resume Monday.

Prosecutors, meanwhile, have updated their list of rebuttal witnesses to include Evelyn Camp, a sister of Mitchell's third wife, Wanda Eileen Barzee, who is a co-defendant in the Smart kidnapping.

Camp testified last year at Mitchell's mental competency hearing that a box of photos given to her by Barzee contained an image of two nude girls, about 6 or 7 years old, sitting on kitchen chairs.

Camp testified that Barzee later said that when she asked Mitchell about the photo, he replied: "Who wouldn't want to take a picture of their little girl naked?"

Prosecutors also have asked Judge Dale Kimball to allow them to present testimony that:

• Mitchell surreptitiously took nude photos of his stepdaughter while she was bathing.

• Mitchell placed dead mice in the oven to terrorize his second wife.

Prosecutors stated in court documents that the proposed evidence is meant to rebut Mitchell's anticipated claim of insanity by "showing a pattern of behavior consistent with personality disorders and sexual deviancy, rather than a severe mental illness.