Lori Vallow Daybell stood still and didn't even flinch as a judge read the verdict saying she has been found guilty in the murders of her two youngest children and her husband's ex-wife.
She appeared in court in a simple black dress and remained expressionless the whole time, in a scene that an expert on her case found made her look "heartless".
John Glatt, who researched the case in depth before publishing his true crime book "The Doomsday Mother", told Mirror Online: "[Her reaction] showed she is completely heartless."