INVESTIGATIVE CASE DOSSIER: JUSTICE FOR HELENE PRUSZYNSKI: HOW GENETIC GENEALOGY SOLVED COLORADO’S 1980 COLD CASE
- Victim: Helene Pruszynski (Age 21; Wheaton College Radio Intern)
- Date of Crime: January 16, 1980
- Location of Discovery: Field in Castle Rock, Douglas County, Colorado
- Perpetrator: James Curtis Clanton / Curtis Allen White (Born 1957; Truck Driver)
- Cause of Death: Multiple stab wounds to the back following abduction and sexual assault
- Breakthrough Method: Forensic Genetic Genealogy (United Breckenridge & CeCe Moore)
- Date of Arrest: December 11, 2019 (Union County, Florida)
- Sentence: Life in prison with parole eligibility after 20 years (Pleaded guilty in Feb 2020)
In January 1980, 21-year-old Massachusetts college student Helene Pruszynski arrived in Denver, Colorado, excited to begin a dream journalism internship at KHOW radio. Just two weeks into her stay, Helene vanished while walking home from a suburban bus stop. The following day, her body was discovered bound and brutally stabbed in a snowy field in Castle Rock. For four decades, Douglas County detectives guarded preserved physical evidence, waiting for forensic technology to catch up. In December 2019, modern investigative genetic genealogy unmasked her killer: 62-year-old Florida truck driver James Curtis Clanton.
The 1980 Abduction and Murder in Castle Rock
On the evening of January 16, 1980, Helene Pruszynski finished her shift at KHOW radio in downtown Denver and boarded an RTD bus home to Englewood, where she was staying with her aunt and uncle. After disembarking at her bus stop around 6:10 PM, she walked down a snowy residential street but never arrived home.
The next afternoon, her body was discovered in an open grazing pasture near Castle Rock, approximately 20 miles south of Denver. She had been tied with her hands behind her back, sexually assaulted, and stabbed nine times in the back. Forensic pathologists collected and carefully preserved the perpetrator’s semen evidence.
The 40-Year Cold Case Impasse
Douglas County Sheriff’s detectives spent decades eliminating suspects. In 1998, criminalists generated an STR DNA profile from the preserved semen and uploaded it to CODIS, but no match was ever recorded. The case seemed frozen until 2017, when Douglas County Sheriff Tony Spurlock partnered with United Data Connect, a forensic genealogy firm led by former Denver District Attorney Mitch Morrissey and genealogist Dr. Colleen Fitzpatrick.
The Genetic Genealogy Breakthrough
Scientists converted the crime scene DNA into an SNP profile and uploaded it to GEDmatch and FamilyTreeDNA. Genealogists constructed ancestral family trees tracing back through the suspect’s paternal and maternal lines to Arkansas and Kentucky.
The research narrowed down to a man who had changed his name from Curtis Allen White to James Curtis Clanton following a 1977 rape conviction in Arkansas. Records showed that after being paroled in 1979, Clanton moved to Englewood, Colorado, and was working as a landscaper just blocks from Helene Pruszynski’s bus route in January 1980.
Undercover Beer Mug Sting and Arrest
In late 2019, Douglas County detectives flew to Union County, Florida, where Clanton was living and working as an interstate truck driver. Undercover detectives followed Clanton into a local tavern in Lake Butler, Florida, and seized a discarded glass beer mug he had used.
The Florida Department of Law Enforcement and Colorado Bureau of Investigation confirmed that the DNA from the beer mug was an exact, indisputable match to the 1980 crime scene profile. On December 11, 2019, Clanton was arrested in Florida and extradited to Colorado.
Guilty Plea and Final Closure
On February 21, 2020, in Douglas County District Court, James Curtis Clanton pleaded guilty to first-degree murder. On July 1, 2020, Judge Theresa Slade sentenced Clanton to life imprisonment. Forty years after Helene’s murder, her surviving sister and cold case detectives attended the sentencing to witness final justice.
Explore related landmark forensic breakthroughs and genetic genealogy investigations including the April Tinsley 1988 cold case, the Bear Brook Murders, the Carla Walker Fort Worth cold case, and the 1987 Van Cuylenborg-Cook murders.
Case Timeline & Key Forensic Milestones
| Date / Year | Milestone / Event | Forensic Significance |
|---|---|---|
| Jan 16, 1980 | Helene Pruszynski abducted walking home from bus stop | Body found next day in Castle Rock, CO |
| 1998 | STR DNA profile uploaded to CODIS | No hits found in state or federal offender databases |
| 2017–2019 | United Data Connect applies genetic genealogy | Ancestral trees identify Curtis Allen White / James Clanton |
| Dec 2019 | Undercover beer mug DNA collection in Florida | 100% DNA match confirmed |
| July 1, 2020 | James Clanton sentenced to life in prison | Closure delivered after 40-year cold case |
Frequently Asked Questions (FAQ)
Who was Helene Pruszynski?
Helene Pruszynski was a 21-year-old Wheaton College student from Massachusetts who was in Colorado working as an intern at KHOW radio when she was murdered in 1980.
How was James Clanton identified 40 years later?
Forensic genealogists mapped family trees on GEDmatch to locate Clanton, who had changed his name from Curtis Allen White following a prior rape conviction in Arkansas.
What sentence did James Clanton receive?
Clanton pleaded guilty to first-degree murder in February 2020 and was sentenced to life imprisonment in Colorado.
