A Utah mother who published a children's book about grief after the sudden death of her husband has been found guilty of his murder.

A jury found that Kouri Richins killed her husband in March 2022 by poisoning him with a fentanyl-laced drink. The jury deliberated the case for about three hours before reaching its verdict on Monday.

During the trial, the court heard how Richins, 35, had racked up millions of dollars in debt, had taken out life insurance policies on her husband, and was having an extramarital affair.

Prosecutors called more than 40 witnesses, including the woman who said she sold the drugs used to kill Eric Richins.

Her defence team chose to not call any witnesses, and rested their case without having her take the stand to testify in her own defence.