In a high-profile murder trial unfolding in Park City, Utah, prosecutors have presented compelling evidence in the case against Kouri Richins, the 35-year-old mother of three and author of a children’s grief book, accused of fatally poisoning her husband, Eric Richins, with a massive dose of illicit fentanyl. Eric Richins, 39, was found unresponsive in their Kamas home on March 4, 2022, after reportedly going to bed following a cocktail prepared at home. Toxicology reports later confirmed fentanyl intoxication as the cause of death, with levels in his system approximately five times the lethal dose — a finding that has remained undisputed throughout the proceedings.

The trial, which began in late February 2026 and saw testimony conclude in mid-March, centers on allegations that Kouri Richins spiked a Moscow mule cocktail with fentanyl and served it to her husband shortly before midnight. Eric reportedly consumed the drink, went to bed, and was discovered cold to the touch around 3 a.m. by his wife, who called emergency services. No alcohol was detected in his system alongside the fentanyl, leading toxicologists to conclude the drug was ingested orally in a lethal, illicit form — not from any prescribed medication.

Forensic toxicologist Brianna Peterson testified that only fentanyl was present at toxic levels, with no other substances contributing to the overdose. Medical examiners, including Dr. Pamela Sue Ulmer and former Utah chief medical examiner Dr. Erik Christensen, affirmed the cause of death as fentanyl intoxication but could not definitively determine the exact method of administration beyond oral ingestion. The absence of injection marks or other indicators supported the prosecution’s theory of the spiked drink.

Prosecutors have built their case around motive, opportunity, and premeditation. They allege Kouri Richins attempted to poison Eric on at least three prior occasions with fentanyl, sourced through her house cleaner, Carmen Lauber, who testified she obtained the drug multiple times for Richins — including a delivery weeks before the fatal incident. Lauber expressed concern, reportedly asking if the pills were “not for him.” Evidence also points to financial pressures: millions in debt, changes to life insurance policies (allegedly forged without Eric’s consent), and attempts to secure payouts post-death. Prosecutors claim the murder was intended to “perpetuate her facade of privilege” amid a rocky marriage and an alleged affair with Robert “Josh” Grossman, who testified emotionally about their relationship in the months leading up to Eric’s death.

A key element now under scrutiny involves phone records from the days and weeks before Eric’s death. Prosecutors have introduced digital forensic evidence from cell phones, showing searches and data linked to fentanyl acquisition, lethal dosages, and related topics. Earlier reports from the investigation highlighted alleged searches on Kouri Richins’ phone for queries like “What is a lethal dose of fentanyl?” alongside others such as “luxury prisons for the rich in America” and questions about recovering deleted messages or police lie detector tests. Phone data also reportedly connected her to key witnesses, including calls to the IRS amid financial issues and communications tying her to drug sources.

While much early 2022 data was deleted, forensic analysts testified that recovered records and patterns bolster the timeline of alleged drug purchases and planning. Prosecutors argue these digital footprints, combined with witness testimony from the house cleaner and others, demonstrate intent and access to the fentanyl used in the fatal cocktail.

The defense has maintained Kouri Richins’ innocence, arguing there is no direct evidence she administered the drug and suggesting alternative explanations, such as possible self-ingestion by Eric (though no supporting evidence of prior fentanyl use was conclusively presented). In a notable development, the defense rested without calling any witnesses, and Kouri waived her right to testify. The judge denied a motion for directed verdict, allowing all charges — including first-degree aggravated murder, attempted criminal homicide, forgery, and fraudulent insurance claims — to go to the jury.

Closing arguments were expected soon after testimony wrapped, with jurors set to deliberate on five counts. If convicted of aggravated murder, Kouri Richins faces 25 years to life in prison.

The case has drawn national attention due to its dramatic elements: a grieving widow who self-published “Are You With Me?” — a children’s book on coping with loss — shortly after her husband’s death, only to face murder charges months later. Eric Richins’ family hired a private investigator whose findings helped propel the case forward, highlighting tensions over estate matters and life insurance.

As the trial nears its conclusion, the focus on phone records underscores the role of digital evidence in modern poisoning cases. Detectives and prosecutors continue to emphasize that the fentanyl level — five times lethal — combined with the home-prepared cocktail and preceding searches, points to deliberate action rather than accident or coincidence.

The Summit County community and Eric’s loved ones await the jury’s verdict in what has become one of Utah’s most closely watched murder trials. Eric Richins, a father of three and business owner, is remembered by those close to him as a dedicated family man whose unexpected death shattered lives and sparked intense scrutiny.