The Murder of Sherri Rasmussen: DNA’s Decades-Long Path to Justice
In the quiet suburb of Van Nuys, California, on February 24, 1986, a promising young nurse named Sherri Rasmussen was found brutally slain in her own condominium. Beaten, strangled, and shot three times at point-blank range, her death was initially dismissed as a random burglary gone wrong. But beneath the surface of this seemingly straightforward home invasion lay a web of jealousy, obsession, and betrayal—one that would take over two decades and groundbreaking DNA technology to unravel.
Sherri, just 29 years old and newly engaged to her loving fiancé John Ruetten, represented the bright future many dream of: a successful career at the UCLA Medical Center, a stable relationship, and plans for marriage. Her murder shattered not only her family but also exposed deep flaws in the Los Angeles Police Department’s handling of the case. The perpetrator? A fellow LAPD detective named Stephanie Lazarus, who had dated Ruetten years earlier and harbored a pathological fixation on him. This story is a testament to the persistence of investigators and the power of forensic science in delivering long-overdue justice.
What makes this case particularly haunting is its slow burn. For 23 years, leads dried up, evidence gathered dust, and Sherri’s loved ones endured agonizing uncertainty. Then, in 2009, a single piece of overlooked evidence—a bite mark on her arm—cracked the case wide open, leading to Lazarus’s arrest and conviction. It’s a narrative of human darkness clashing with technological triumph, reminding us that even the most cunning criminals can be brought to account.
Who Was Sherri Rasmussen?
Sherri Rasmussen was born on April 27, 1956, in Arleta, California, the eldest of four siblings in a close-knit family. Described by those who knew her as kind-hearted, intelligent, and fiercely dedicated, she pursued a career in nursing after graduating from Loma Linda University. By 1985, she had risen to the position of head nurse in the cardiac care unit at UCLA Medical Center, where her compassion earned her widespread admiration from colleagues and patients alike.
In 1984, Sherri met John Ruetten, a 25-year-old engineering graduate student at UCLA. Their romance blossomed quickly, marked by shared interests in hiking, travel, and building a life together. They became engaged in early 1986, with wedding plans in motion. Friends recalled Sherri’s excitement about her future, often speaking of her dreams for a family and continued professional growth. Tragically, her life was cut short just weeks before those dreams could materialize.
Sherri’s family, particularly her parents, Nels and Lois Rasmussen, would become pillars in the fight for justice. Their unwavering advocacy kept the case alive through years of frustration with law enforcement.
The Crime Scene: A Brutal and Staged Attack
On the morning of February 24, 1986, John Ruetten returned from a business trip to find his fiancée dead in their two-bedroom condo at 622 Greenmeadow Avenue. Sherri lay on the living room floor, clad in a robe, her body bearing the marks of a savage assault. She had been punched repeatedly in the face, her jaw fractured in two places. Compression marks on her neck indicated manual strangulation, and three gunshot wounds to the chest—from a .38-caliber revolver—sealed her fate. Time of death was estimated between 9 a.m. and noon.
The scene suggested a burglary: drawers emptied, jewelry boxes overturned, and a television reportedly stolen (later recovered nearby). However, anomalies raised red flags. No forced entry; the perpetrator likely had a key or was let in. Sherri’s wedding ring and diamond earrings remained untouched, valuables overlooked in drawers. Most strikingly, a bite mark on her left forearm showed tissue missing—clear evidence of a personal, rage-fueled attack rather than a mere robbery.
Autopsy confirmed the sequence: beating, attempted strangulation, then shots fired. Toxicology showed no drugs or alcohol in her system. The brutality spoke volumes— this was no stranger crime but one driven by intimate hatred.
Initial Investigation: Oversights and Tunnel Vision
LAPD detectives assigned to the case treated it as a burglary-homicide. They interviewed Ruetten, who passed a polygraph and provided an alibi. Neighbors reported hearing gunshots around 9-10 a.m., but no suspect descriptions emerged. A palm print on the condo door was unidentified, and the bite mark was photographed but not swabbed for DNA—technology not yet viable in 1986.
Early suspicions briefly turned to Ruetten due to his calm demeanor and questions about his past relationships. He disclosed dating Stephanie Lazarus in college, but dismissed any ongoing contact. Detectives noted bite mark evidence in their report but pursued no dental forensics. Within weeks, the case stalled, filed as a cold case amid LAPD’s heavy caseload, including the infamous Night Stalker murders.
Critics later pointed to investigative biases: assuming a “random” burglary ignored the staging. Ruetten’s family pushed for deeper scrutiny of Lazarus, but leads evaporated. For years, the Rasmussens received little updates, fueling distrust in the system.
The Case Goes Cold: Years of Frustration
By the late 1980s, Sherri’s murder joined thousands of unsolved homicides in Los Angeles. The Rasmussens hired private investigators, who uncovered Lazarus’s LAPD career and her college romance with Ruetten. In 1990, they confronted detectives with this, even providing a photo of Lazarus biting Ruetten playfully—eerily similar to the crime scene mark. Yet, no action followed; Lazarus, now a rising star in LAPD’s Art Theft Detail, was deemed untouchable.
Throughout the 1990s and early 2000s, the family persisted. Annual pleas to LAPD yielded platitudes. Meanwhile, Lazarus thrived professionally, earning promotions and commendations. The irony was profound: a cop potentially evading justice for her own department.
The Breakthrough: DNA from a Forgotten Bite Mark
Revival in the Cold Case Unit
In 2004, Det. Gregg Strenk of the LAPD’s Cold Case Unit revisited the file. Reviewing evidence, he focused on the bite mark swab—collected post-autopsy but untested. Using PCR DNA amplification, viable female DNA emerged, matching neither Sherri nor known associates. This partial profile entered CODIS, the national database, but yielded no hits initially.
Strenk’s team re-interviewed Ruetten and canvassed associates. Lazarus’s name resurfaced via family tips. In 2005, they covertly obtained discarded DNA from her— a pizza crust and straw from her office trash. It matched the bite mark perfectly: 100% certainty.
Building the Case Against Lazarus
Surveillance confirmed Lazarus’s access: she had keys from dating Ruetten and knew his schedule. Phone records showed hang-ups at the Ruetten residence pre-murder. Witnesses recalled her obsessive behavior post-breakup, including stalking.
To avoid alerting her, detectives used subterfuge. In June 2009, they summoned Lazarus to Parker Center under false pretenses—a supposed burglary at her home. Confronted with DNA evidence, she feigned shock but soon confessed elements during interrogation.
Arrest, Interrogation, and Trial
Arrested on June 5, 2009, Lazarus, then 49, faced first-degree murder charges. Her interrogation video became trial centerpiece: calm at first, she crumbled, admitting to the crime in a tearful, rambling admission. “I knew I did it,” she said, describing snapping in jealousy upon learning of Sherri’s engagement.
Trial began March 2012 in Van Nuys Superior Court, Judge Lesley Johnson presiding. Prosecutor Bob Ricciardelli presented irrefutable DNA, crime scene staging, and Lazarus’s motive: unrequited love turned deadly. Defense claimed insufficient evidence, polygraph innocence (inadmissible), but the bite mark DNA was damning.
Witnesses included Ruetten, who testified to Lazarus’s fixation, and experts matching the bite to her teeth via molds. After 11 days of testimony, jury deliberated four hours: guilty on first-degree murder. Sentenced to 27 years to life on May 11, 2012—no parole for 15 years.
Psychological Profile and LAPD Fallout
Lazarus exhibited classic stalker traits: obsession, denial, compartmentalization. Psychologists noted her ability to function as a detective while hiding murderous rage, akin to other “killer cop” cases. The scandal rocked LAPD, prompting reviews of cold cases for internal involvement and reforms in evidence handling.
John Ruetten expressed relief but lifelong grief. The Rasmussens hailed it as vindication, though no solace for lost time.
Legacy: Lessons in Persistence and Forensics
Sherri Rasmussen’s case revolutionized cold case protocols. It underscored DNA’s role in re-examining evidence and warned against institutional blind spots. Today, Lazarus remains incarcerated at Central California Women’s Facility. Her appeals failed, solidifying the verdict.
The story endures as inspiration for victim advocates, proving justice delayed need not be denied.
Conclusion
The murder of Sherri Rasmussen stands as a stark reminder of jealousy’s destructive power and the redemptive force of science. From a savaged crime scene to a courtroom reckoning 26 years later, this saga honors Sherri’s memory while exposing flaws in pursuit of truth. For her family, closure came late but decisively— a beacon for every unsolved case waiting in the shadows. True justice, it seems, has no expiration date.
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