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 defense team chose to not call any witnesses and rested their case without having her take the stand to testify in her own defense. Richins was also found guilty of fraudulently claiming insurance benefits after her husband's death at their home outside the ski resort town of Park City. Prosecutors said during the trial that she falsely believed she would inherit his estate worth more than $4 million after he died. They also said she was planning a future with another man with whom she had been having an affair. Officials said Richins was found to have poisoned her husband's sandwich in an earlier incident, nearly killing him, before later increasing the dosage until he died. She was also found guilty of attempted murder over this incident. Richins pleaded not guilty to all the charges, and the most serious charge of aggravated murder carries a sentence of 25 years to life in prison. Prosecutor Brad Bloodworth stated, She wanted to leave Eric Richins but did not want to leave his money. Richins was arrested in March 2023, two months after she published the picture book Are You With Me?, which she claimed was designed to help people, including her three children, cope with the death of a loved one. We wrote this book and we're really hoping that it provides some comfort for our family and other families going through the same thing, she said in a pre-arrest interview. Richins dedicated the book to her husband, referring to him as my amazing husband and a wonderful father. According to court documents, Richins texted a person previously arrested on drug charges asking for prescription pain medication shortly before her husband's death. She reportedly requested fentanyl, referencing it as some of the Michael Jackson stuff. In one incident after a Valentine's Day dinner, Eric Richins fell ill, believing he had been poisoned. Two weeks later, she acquired more fentanyl. On March 4, 2022, she called the police, claiming to have found her husband unresponsive after serving him a vodka drink. A medical examiner later confirmed he had died from a fentanyl overdose, four times the lethal dosage of the drug in his system.