In coming days, defense attorneys for Huntsman are likely to closely examine her background to search for any evidence of mental illness or a family history that would help explain the alleged killings, said George Parnham, who represented Andrea Yates, the Texas woman who drowned her five children in her bathtub in 2001.
Defense attorneys also will try to determine whether Huntsman sought an abortion and if she told anyone about her pregnancies — all in hopes of understanding actions that otherwise appear incomprehensible, Parnham said.
"You start off with the very nature of what happened. Is there a rational motive?" he said.
Associated Press writers Michelle Price in Salt Lake City and Matthew Brown in Billings, Mont., contributed to this report.