Park City: A Utah woman who wrote a children’s book about coping with grief after her husband’s death was convicted of aggravated murder in his death by poisoning him with fentanyl. Prosecutors say Kouri Richins slipped five times the lethal dose of the synthetic opioid into a cocktail that Eric Richins drank in March 2022 at their home outside the ski town of Park City. They say Kouri was $US4.5 million ($6.4 million) in debt and falsely believed that when her husband died, she would inherit his estate worth more than $US4 million. They also say she was planning a future with another man she was seeing on the side. Kouri stared at the floor and took deep breaths as the judge read the verdict on Monday (Utah time). Family members on both sides of the case left the courtroom, hugging and crying.…