The Heartbreaking Murder of Jonelle Matthews: Colorado’s Cold Case Solved After 35 Years

On the evening of December 20, 1984, in the quiet town of Greeley, Colorado, 12-year-old Jonelle Matthews stepped into her home after choir practice, her life forever altered in an instant. The adopted daughter of Jim and Gloria Matthews, Jonelle was a bright, outgoing girl known for her love of music and her close-knit family bonds. That night, she was home alone briefly while her parents and sister attended a high school basketball game. When they returned, Jonelle was gone—no struggle evident, no signs of forced entry, just her shoes neatly placed by the door and a country song faintly playing on the stereo.

This puzzling vanishing ignited one of Colorado’s most enduring mysteries, captivating investigators, volunteers, and the true crime community for decades. Searches combed fields, rivers, and remote areas, but no trace emerged. Jonelle’s case faded into cold case status, a haunting reminder of vulnerability in small-town America. Yet, persistent detective work, advanced forensics, and a stroke of construction luck would unearth the truth 35 years later, leading to justice for a young girl whose smile lit up family photos.

The resolution not only closed a painful chapter for the Matthews family but highlighted the power of DNA technology in reviving stalled investigations. This is the story of Jonelle Matthews—a tale of innocence lost, relentless pursuit, and eventual accountability.

Jonelle Matthews: A Life Cut Short

Jonelle Renae Matthews was born on November 29, 1972, in Salt Lake City, Utah. Her early years were marked by tragedy; her biological mother, Sandra Kay Smallegan, died of a drug overdose when Jonelle was just three months old. Placed in foster care, she was adopted at age four by Jim and Gloria Matthews, a loving couple from Greeley, Colorado. The Matthews family provided stability: Jim worked as a school principal, Gloria as a secretary, and they raised Jonelle alongside her adopted sister, Sherrie.

Jonelle thrived in Greeley, a farming community north of Denver. She was an active seventh-grader at Heath Junior High School, participating in choir, playing clarinet in the band, and cheering at school events. Described by friends and family as bubbly and kind-hearted, she dreamed of becoming a singer. Photographs capture her wide smile, curly hair, and infectious energy. On December 20, 1984, she attended choir practice at Christ the King Catholic Church, performing in the children’s choir for the upcoming Christmas season.

Family Dynamics and the Fateful Evening

The Matthews home at 1125 32nd Avenue was modest and secure, located in a family-oriented neighborhood. That Thursday evening, Gloria dropped Jonelle off at home around 7:30 p.m. after practice, instructing her to stay inside and await their return from Sherrie’s basketball game. Jonelle entered through the front door, kicking off her shoes—a habit noted by her family. She turned on the stereo to KTCL radio, tuning into a country station playing “Lady Lay Down” by John Conlee.

Jim and Gloria returned around 9:30 p.m., expecting to find Jonelle reading or watching TV. Instead, the house was empty and eerily silent except for the radio. No windows broken, no blood, no ransom note. The family called police immediately, fearing abduction. Jonelle’s coat hung unused in the closet, and her clarinet case sat untouched—details that puzzled investigators from the start.

The Massive Search and Initial Investigation

Greeley Police launched an immediate response, treating the case as a potential runaway or abduction. Over 1,000 volunteers joined the search, scouring 10,000 acres with helicopters, dogs, and horseback teams. Divers dragged the South Platte River and Poudre River, while tips flooded in from as far as Texas. Media coverage exploded, with Jonelle’s face on milk cartons and “America’s Most Wanted” segments.

Early leads included a possible sighting at a convenience store and unverified claims of a girl matching her description in Denver. Investigators interviewed classmates, teachers, and neighbors. Polygraph tests were administered to family members, all passing. Suspicion briefly fell on transients or a parental custody dispute rumor, but nothing substantiated.

Key Evidence and Roadblocks

The scene yielded scant forensics: a single unidentified fingerprint on a windowsill, footprints in nearby snow (quickly melting), and tire tracks ruled inconclusive. No sexual assault evidence presumed at the time. Detectives noted the lack of struggle suggested Jonelle knew her abductor. A neighbor reported seeing headlights around 8 p.m., but no vehicle description.

  • Volunteer Efforts: Local farms, landfills, and abandoned buildings were combed exhaustively.
  • Psychic Tips: Several claimed visions, including one pointing to a buried body, but all false.
  • National Attention: FBI involvement classified it as a parental kidnapping initially, later shifting to homicide.

By spring 1985, hope waned. The case went cold, assigned to Detective Gary Hix. Annual anniversaries kept it alive, with the family maintaining a memorial scholarship in Jonelle’s name.

Decades in the Shadows: The Cold Case Era

For 34 years, Jonelle’s disappearance haunted Greeley. The Matthews family endured endless speculation—podcasts, books, and online forums dissected theories from serial killers to family involvement. Jim and Gloria, now retired, never stopped advocating, plastering flyers and attending conferences.

Advancements in forensics offered glimmers: In 2008, the FBI’s Violent Criminal Apprehension Program (ViCAP) reviewed the file. DNA from the scene was preserved, though degraded. Sherrie Matthews, Jonelle’s sister, became a driving force, marrying and raising children while pushing for re-examination.

Suspects Over the Years

Steven Jeffrey Rezac emerged early. A 27-year-old Greeley resident living two blocks away at the time, he was a family acquaintance who had visited the Matthews home. Rezac failed a 1985 polygraph and provided inconsistent alibis. He moved frequently, accruing minor arrests for theft and drugs. In 1993, he served prison time for burglary. Despite suspicions, lack of physical evidence stalled charges.

Other persons of interest included a convicted child killer and transient workers, but none linked definitively. The case file grew to thousands of pages, symbolizing investigative perseverance amid budget cuts and turnover.

The Breakthrough: Discovery and DNA Justice

Fortune intervened on July 23, 2019. During demolition of a long-vacant house at 444 13th Street—three miles from the Matthews home—workers unearthed a concrete slab hiding skeletal remains wrapped in a quilt. The site, owned by the city, had been a rooming house in 1984.

Anthropologists confirmed the bones belonged to a pre-teen female dead 30-40 years. Clothing matched 1980s styles: a red velour top and leggings akin to Jonelle’s. Dental records sealed identification on August 2, 2019. Autopsy revealed two .22-caliber gunshot wounds to the head, execution-style, with no signs of prior trauma.

Linking Rezac Through Forensics

Detective Brook Farless re-interviewed witnesses. A microscopic hair on the quilt yielded nuclear DNA matching Rezac with 99.999% certainty via CODIS database. Rezac, now 62 and living in Colorado Springs, was arrested November 2022 after a grand jury indictment.

Interrogation revealed lies: Rezac claimed ignorance but knew details only the killer would. Cell data placed him near the burial site. He had ties to the house’s owner and access to a .22 rifle.

The Trial: Justice After Endurance

Rezac’s trial began September 18, 2023, in Weld County District Court. Prosecutor Michael Rourke presented a meticulous case: DNA, ballistics, timeline, and motive—Rezac allegedly lured Jonelle to his home, assaulted her, then killed to silence her.

Defense argued contamination and coincidence, but jurors convicted on first-degree murder after 12 hours deliberation on September 27. Judge Thomas Quammen sentenced Rezac to life without parole on October 30, 2023. Rezac showed no remorse, maintaining innocence.

  • Victim Impact: Gloria testified, “We got justice, but no Jonelle.”
  • Family Relief: Sherrie called it “bittersweet closure.”
  • Investigative Praise: Over 20 detectives contributed across decades.

Motive remains murky—possibly opportunistic after a chance encounter. No sexual assault confirmed, but the brutality underscored depravity.

Psychological Insights and Broader Impact

Jonelle’s case exemplifies “missing white girl syndrome,” sustaining media focus rare for other demographics. It underscores abductions by acquaintances: 76% of child murders involve known perpetrators per FBI stats.

Rezac fits offender profiles—history of opportunism, failed polygraphs signaling deceit. Psychological autopsies suggest thrill-kill or cover-up impulse. For families, unresolved grief manifests in PTSD, as Gloria endured panic attacks.

Legacy includes advocacy: Colorado’s cold case unit expanded, crediting Jonelle’s revival. Her scholarship aids music students, perpetuating her passion.

Conclusion

The murder of Jonelle Matthews, once a fathomless void, now stands as a testament to forensic evolution and human resolve. From a silent home in 1984 to a courtroom reckoning in 2023, justice prevailed against time’s erosion. Yet, for the Matthews family, no verdict restores their daughter. Jonelle’s story urges vigilance, honors the lost, and reminds us: even coldest cases can thaw. May her memory inspire closure for others waiting in the shadows.

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