Lori Vallow Daybell has been found guilty of murdering two of her children and conspiring to murder a romantic rival.
The verdict was announced in court, and a sentencing hearing will be scheduled at a later date.
Vallow Daybell could face life in prison for her crimes.
The trial included graphic evidence presented by the prosecution, including images of the children's bodies.
The defense chose not to call any witnesses and rested its case shortly after the prosecution finished presenting.
Vallow Daybell is accused of killing her two youngest children, Tylee Ryan and Joshua Jaxon "JJ" Vallow, and conspiring to murder her husband's previous wife.
The trial revealed Vallow Daybell's religious beliefs about zombies and a doomsday scenario, which prosecutors cited as partial motives for the alleged murders.
Prosecutors argued that the couple planned to kill their closest relatives for financial gain through insurance payouts and Social Security benefits.
The defense claimed Vallow Daybell was under the influence of her husband, whom she saw as a messiah, and failed to directly tie her to the deaths of her children.
Money played a significant role in the case, with the couple benefiting financially from the deaths and attempting to create a new life for themselves.
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