In the quiet mountain town of Kamas, Utah, just outside the upscale ski resort of Park City, a single cocktail ended a marriage, a life, and now threatens to upend an entire family. On the night of March 3, 2022, 39-year-old Eric Richins — successful businessman, devoted father of three, and owner of a local construction and excavation company — went to bed after what toxicology and court records describe as nothing more than one ordinary Moscow Mule. Several hours later, he was gone.

What began as a routine evening at home has become one of Utah’s most high-profile murder trials in 2026. Eric’s wife, 35-year-old Kouri Richins — a real estate agent, mother, and self-published children’s book author who wrote about grief after his death — stands accused of slipping a lethal dose of illicit fentanyl into that single drink. Prosecutors allege she administered nearly five times the fatal amount, motivated by millions in life insurance payouts, crushing family debt, a secret affair, and a desire for a fresh start.

But as the trial enters its third week in Summit County, investigators and jurors are zeroing in on a narrower, more technical question: the precise “type of use” of the fentanyl itself. Toxicology reports confirmed only fentanyl and its metabolite norfentanyl in Eric’s system — no other drugs, no alcohol beyond the trace expected from one mixed drink. The substance was present in his bloodstream at 15 nanograms per milliliter, a level experts say is overwhelmingly lethal for a non-tolerant individual. Yet the pills that delivered it were not pharmaceutical-grade. They were street-manufactured, counterfeit oxycodone-style tablets pressed with illicit fentanyl — the kind flooding the U.S. from Mexican cartels and underground labs.

The question still haunting detectives, prosecutors, and now the courtroom: exactly who manufactured this particular batch of poison?

The Night That Changed Everything

According to statements Kouri Richins gave police the morning of March 4, 2022, the couple had celebrated a successful real estate closing. She mixed Eric his favorite Moscow Mule — vodka, ginger beer, lime — and brought it to him in their bedroom. He drank it, they talked briefly, and he fell asleep. She later told investigators she found him unresponsive at the foot of the bed around 3 a.m.

Paramedics and police arrived to a chaotic scene. Eric was pronounced dead at the home. Initial speculation pointed to a possible brain aneurysm — a story Kouri repeated to family and friends. But the autopsy and toxicology report delivered a different verdict: acute fentanyl toxicity. No signs of chronic drug use. No other substances. Just one fatal dose delivered in one glass.

Court filings and testimony in the ongoing 2026 trial have painted an even more precise picture. Forensic toxicologist Brianna Peterson of NMS Labs testified that the concentration was five times the minimum lethal threshold for fentanyl. “This was not a recreational amount,” she told jurors. “This was intended to kill.”

The defense has pushed back hard, suggesting Eric may have obtained the drug himself during a recent trip to Mexico — a country that supplies the vast majority of illicit fentanyl entering the United States. Defense attorney Caroline Nester told the jury: “Guess where the fentanyl comes from into this country from? Mexico.” But prosecutors countered with phone records, text messages, and witness testimony showing Kouri actively sought out stronger opioids in the weeks before Eric’s death.

How the Fentanyl Got Into the Home

The prosecution’s star witnesses have traced a clear supply chain — not from some distant cartel lab directly to Eric, but through two local intermediaries right in the Richins’ orbit.

Former family housekeeper Carmen Lauber testified that Kouri asked her to buy fentanyl pills on multiple occasions starting in February 2022. The first purchase was for “pain meds for an investor,” Lauber claimed. When those weren’t strong enough, Kouri allegedly requested “something stronger.” Lauber contacted Robert Crozier, a local man she knew who was selling pills at the time. Crozier handed over the fentanyl-laced tablets at a gas station meet-up. Text messages recovered from Kouri’s phone show her responding “OK, go ahead and get them” when informed of the deal.

Crozier himself took the stand — and his testimony has been explosive. In a recorded jailhouse interview played for jurors, he admitted selling the pills to Lauber. On the stand, however, he backtracked, claiming he was only moving pharmaceutical oxycodone at the time and didn’t start selling fentanyl until later in 2022. The defense seized on the inconsistency, accusing Lauber of lying to protect herself from federal drug charges.

Yet the physical and digital evidence appears damning. Phone records, cash transfers, and Kouri’s own deleted search history (including queries about fentanyl and life insurance payouts) form the backbone of the case. Prosecutors say she made at least three purchases through Lauber before the fatal night — and even attempted an earlier poisoning on Valentine’s Day 2022, when Eric suffered hives and blacked out after eating a sandwich she prepared.

The Motive: Money, Marriage, and a Secret Life

Eric Richins built a successful construction and excavation business in the Park City area. Court records show the couple lived in a multimillion-dollar home, but behind the glossy exterior lay deep financial trouble. Kouri faced mounting credit card debt, forged documents, and mortgage fraud charges now bundled into the murder case. Prosecutors allege she stood to gain more than $2 million in life insurance and business assets upon Eric’s death.

Text messages introduced in court reveal a strained marriage. Kouri complained about Eric’s “controlling” behavior and expressed desire for a “fresh start.” Jurors also heard from her former boyfriend, Robert Josh Grossman, who appeared emotional on the stand as he described their affair intensifying in the months before Eric died. Grossman testified that Kouri talked about leaving her husband — but never mentioned violence.

Eric’s family and business partner have painted a different picture: a loving father who doted on his three young sons and had no history of drug use. His sister, Katie Richins, has attended every day of the trial, visibly distraught. “He went to bed after one drink,” she told reporters outside court. “That’s all the toxicology showed he consumed.”

The Fentanyl Question: Street Product, Cartel Origins, or Something Closer to Home?

As the trial focuses on the “type of use,” forensic experts and investigators have emphasized one critical detail: the fentanyl was illicit — counterfeit pills, not diverted prescription medication. The Utah Bureau of Forensic Services tested samples but found no residue on glasses, bottles, or surfaces in the home that would indicate accidental contamination. The only logical conclusion, prosecutors argue, is intentional administration.

But the deeper mystery persists: who actually pressed and manufactured the specific pills that killed Eric Richins?

Fentanyl flooding Utah and the Mountain West in 2022 was overwhelmingly produced in clandestine Mexican labs run by cartels like Sinaloa and Jalisco New Generation. Precursors from China are shipped to Mexico, synthesized into powder, then pressed into fake oxycodone or Xanax pills using pill presses smuggled across the border. These pills are then distributed through regional networks — exactly the kind of low-level dealer Crozier admitted being part of.

Defense attorneys have tried to exploit this supply chain, hinting that Eric himself may have purchased the drugs during travel or through unknown contacts. But no evidence of Eric using fentanyl has emerged. His business partner testified that Eric was focused on work, family, and coaching his sons’ sports teams — not recreational drugs.

A senior forensic scientist from the Utah Bureau of Forensic Services testified that no fentanyl residue was found on items collected from the home beyond what was consistent with the lethal dose in Eric’s blood. In other words, the poison entered his system through that single Moscow Mule — not through chronic use or environmental exposure.

Kouri Richins’ Double Life: Author, Realtor, Accused Killer

The case took on a macabre twist when Kouri self-published a children’s book titled “Are You With Me?” in early 2023 — nearly a year after Eric’s death. Marketed as a story to help kids cope with grief, it featured illustrations of a mother and children saying goodbye to a father who “went to heaven.” She promoted it heavily on social media, appearing on local TV and even speaking at events about loss.

Prosecutors called it “the ultimate insult,” arguing she profited from the very grief she caused. The book remains available online, though many retailers pulled it after her 2023 arrest.

Kouri has pleaded not guilty to aggravated murder, attempted murder, and dozens of financial crimes. She sits quietly in court each day, dressed modestly, occasionally taking notes. Her attorneys argue the case is built on circumstantial evidence and unreliable witnesses desperate for plea deals. They point to deleted phone data and claim investigators rushed to judgment.

Community Impact and the Broader Fentanyl Crisis

The trial has gripped Utah. Park City and Summit County residents — many of whom knew the Richins family through school events, real estate deals, or construction projects — are divided. Some see Kouri as a cold-hearted killer who exploited the opioid epidemic. Others wonder how a seemingly perfect suburban mom could orchestrate such a crime.

The case also highlights the terrifying reality of today’s fentanyl crisis. In 2022, Utah recorded hundreds of overdose deaths, most involving counterfeit pills that look identical to legitimate medication. The “one type of use” investigators are dissecting — illicit, high-potency, cartel-manufactured fentanyl — is the same substance killing thousands of Americans monthly. A single pill can be fatal. In Eric Richins’ case, the dose was equivalent to five.

Eric’s three sons, now teenagers, have been shielded from much of the publicity. Family members say they continue therapy and remember their father as a man who loved the outdoors, construction sites, and coaching youth sports.

What Happens Next?

As of March 12, 2026, the trial continues with more witnesses expected, including additional financial experts and possibly Kouri herself. The jury must decide not only whether she poisoned her husband, but whether the evidence proves beyond reasonable doubt that the fentanyl in that Moscow Mule came from her hands.

The lingering question of manufacture may never be fully answered in court. Cartel chemists in hidden Mexican labs rarely leave traceable fingerprints. The pills that killed Eric Richins were likely one small batch in a massive pipeline stretching from foreign super-labs to American streets.

Yet for Eric’s family, the answer that matters most is far simpler: who put the poison in the glass? Toxicology says one drink. Court records say one lethal dose. And the evidence, prosecutors insist, points directly at the woman who mixed it.

Eric Richins went to bed after a single Moscow Mule. He never woke up. In the quiet courtroom in Summit County, a jury is now deciding whether that one glass — and the mysterious substance it contained — was the final, deliberate act in a marriage that had already died long before.

The secrets of who manufactured the fentanyl may remain buried in cartel territory south of the border. But the question of who delivered it into Eric Richins’ final drink is the one this trial was built to answer.