A Utah mother who once wrote a children’s book about coping with grief after the loss of a spouse has been sentenced to life in prison without the possibility of parole after being convicted of murdering her husband with a lethal dose of fentanyl, bringing a dramatic end to a case that prosecutors say exposed a calculated financial motive behind his death.

Kouri Richins, 35, was convicted in March of aggravated murder in connection with the 2022 death of her husband, Eric Richins, who authorities said was poisoned at their home near Park City. Prosecutors alleged she laced his cocktail with a dose of fentanyl roughly five times the amount needed to be fatal, causing his death shortly after ingestion.

At sentencing, Third District Judge Richard Mrazik imposed the mandatory life sentence, emphasizing the severity of the crime and the threat he believed Richins posed to the public if ever released.

“A person convicted of those things is simply too dangerous to ever be free,” Mrazik said in court, delivering the sentence on what would have been Eric Richins’ 44th birthday.

Courtroom proceedings were emotional as members of Eric Richins’ family looked on, many holding tissues as the sentence was read aloud. Richins herself wore a lime green jail uniform and appeared to speak quietly with her legal team before the hearing began. Her attorneys declined to make a statement before sentencing.

Prosecutors painted a portrait of a carefully planned killing driven by financial pressure and personal motivations. They said Richins, a real estate agent involved in property flipping, was facing millions of dollars in debt at the time of her husband’s death. According to evidence presented at trial, she had also begun a relationship with another man and allegedly believed she would gain access to her husband’s estate, which was valued at more than $4 million.

Investigators also revealed that Richins had taken out multiple life insurance policies on Eric Richins without his knowledge. Prosecutors argued these financial arrangements, combined with her internet search history and communications, pointed to premeditation rather than a spontaneous act.

Jurors in Park City ultimately convicted Richins on five felony counts, including attempted murder related to an earlier incident in which prosecutors said she tried to poison her husband on Valentine’s Day using a fentanyl-laced sandwich. That earlier attempt, according to the state, failed but demonstrated intent and planning that preceded the fatal poisoning weeks later.

Throughout the trial, prosecutors presented text messages between Richins and her alleged lover, which they said revealed fantasies about leaving her husband and obtaining financial freedom. They also introduced digital evidence from her phone, including searches related to fentanyl toxicity, luxury prison conditions, and how poisoning deaths are recorded on official death certificates.

Richins maintained her innocence throughout the case, rejecting the jury’s findings even after the verdict was delivered. Speaking after the conviction, she called the outcome “an absolute lie,” insisting she had been wrongfully accused.

Her case attracted widespread attention from true crime audiences, in part because of her public image prior to her arrest. Richins had written and promoted a children’s book titled Are You With Me?, which centers on helping young children cope with the death of a parent. The contrast between that public persona and the allegations against her became a focal point of media coverage as the investigation unfolded.

The sentencing hearing came after a trial that lasted less than the originally scheduled five weeks. Richins ultimately chose not to testify in her own defense, and her legal team rested without calling witnesses. Defense attorneys argued that prosecutors had failed to meet the burden of proof and maintained that the evidence did not conclusively establish guilt.

However, jurors were persuaded by what prosecutors described as a consistent pattern of motive, opportunity, and digital evidence suggesting intent to kill. The jury found her guilty not only of aggravated murder but also of additional related charges tied to the attempted poisoning earlier that year.

After the verdict, members of Eric Richins’ family expressed relief that the legal process had concluded, though they emphasized the lasting emotional impact of his death. His sister, Amy Richins, said the conviction provided a measure of closure and allowed the family to focus on supporting the couple’s three sons.

At the time of their father’s death, the children were nine, seven, and five years old. In statements submitted to the court before sentencing, all three children expressed fear and emotional distress at the possibility of their mother ever being released from prison.

The oldest son, now 13, told the court he was afraid she might harm him and his siblings if freed. “I’m afraid if she gets out, she will come after me and my brothers, my whole family,” he said in a written statement. “I think she would come and take us and not do good things to us, like hurt us.”

The middle child said he hoped for a future where he could live without fear, stating that he wanted to grow up “happy and successful” without worrying about his mother’s actions. The youngest said he would be “so scared” if she were ever released.

Prosecutors emphasized these statements during sentencing, arguing that the impact of the crime extended far beyond Eric Richins’ death and permanently altered the lives of his children.

During the trial, the prosecution described Richins as motivated by financial gain, pointing to debt pressures and insurance payouts as central factors in their theory of the case. They argued that her actions were deliberate and calculated rather than impulsive.

Defense attorneys countered that the evidence was circumstantial and urged jurors to consider alternative explanations, but the jury ultimately sided with the prosecution.

With the life sentence now imposed, Richins will spend the remainder of her life in prison without the possibility of parole. The judge’s ruling marks the final step in a case that has drawn national attention for its combination of domestic tragedy, alleged financial motive, and the stark contrast between Richins’ public writing about grief and the accusations that led to her conviction.

Authorities say the case is now closed at the trial level, though the defense may pursue future appeals.