Ted Bundy DNA Twist Closes 1974 Murder

Blue binder labeled cold case with colored binders in background — Photo: wavebreakmedia / Shutterstock

A half-century-old homicide can be resolved with modern genetics, but only when science and stewardship meet; in Melissa Ann Smith’s 1974 murder, Utah investigators say they got both, using preserved evidence and a paternal-line DNA method to connect the case to Ted Bundy.

The Short Version

Utah authorities closed the 1974 homicide of 17-year-old Melissa Ann Smith, attributing the crime to Ted Bundy based on DNA and corroborating case factors.
Laboratory testing tied a Y-STR DNA profile from Smith’s autopsy evidence to the same Y-STR profile recovered in the Laura Aime homicide; Aime’s case had separately matched Bundy’s archived DNA.
Multiple agencies endorsed the closure, citing alignment of pattern, means, and opportunity alongside the genetic linkage.
The method used, Y-STR analysis, identifies a paternal lineage rather than a single person; investigators leaned on corroboration and Bundy’s documented presence in Utah in 1974.

What investigators concluded and why it matters

Summit County officials announced the closure of the Melissa Ann Smith homicide after the Utah State Crime Lab reported a genetic bridge from Smith to a second 1974 Utah victim, Laura Aime, and from Aime to Bundy’s known DNA profile. The sheriff and county attorney framed the result as the convergence of forensic identification and traditional casework—pattern, motive, means, and opportunity—justifying an official attribution to Bundy and the end of a five-decade investigation. That conclusion, carried the same day by national and local outlets, rested on preserved biological material from the original autopsy, interagency collaboration, and a testing strategy that could still extract probative information from limited, aging samples.

For families and investigators, this is the arc of contemporary cold-case work: curated archives meet tools with finer resolution. The Bundy connection to Smith, while new in its forensic underpinning, sits inside a well-documented series of Utah crimes committed during his time in the state—one more chapter in a regional pattern that law enforcement has pieced together over years of parallel inquiries.

The mechanism: how the DNA chain connects Smith to Bundy

The technique at the center of the announcement is Y-STR profiling—short tandem repeats on the Y chromosome, inherited along the paternal line. Investigators described three sequential anchors. First, Aime’s case produced a DNA profile that directly matched Bundy’s archived reference sample maintained in Florida, using standard forensic STR comparison. Second, analysts developed a Y-STR profile from Aime’s evidentiary material. Third, they recovered a Y-STR profile from Smith’s autopsy evidence that matched Aime’s Y-STR profile. The logic is lineage-based: if Smith’s and Aime’s Y-STRs are the same, and Aime’s profile is paired with a direct match to Bundy, then the paternal lineage implicated in both homicides is Bundy’s.

Y-STRs excel in male-specific detection—especially in mixtures dominated by female DNA—but they delineate a lineage, not a single individual. In practice, their evidential value scales with the breadth of the marker set and the rarity of the haplotype in the relevant population. Rapidly mutating Y-STRs can further differentiate paternal relatives across generations, raising the discriminating power when available and interpretable. This is why agencies often position Y-STR matches as potent when paired with independent anchors—here, the separate autosomal STR link between Aime and Bundy, plus the case-fit of Bundy’s Utah activity in late 1974.

How we got here: preservation, collaboration, and timing

The road to a workable comparison began in evidence rooms, not laboratories. Agencies retained autopsy-derived material and associated case exhibits from the 1970s, stored long past the era when such retention was routine. Decades later, Utah County detectives revisited Aime’s case and developed profiles; that work, in turn, prompted Summit County and Salt Lake County investigators to re-examine Smith’s evidence for male-line DNA that could be compared. By mid-2026, the state lab had the components needed to align the cases and route the combined findings for prosecutorial review and, ultimately, the official closure announcement.

That workflow mirrors broader best practices in cold-case management: triage by evidentiary viability, method selection matched to sample condition, and multi-agency coordination when crimes and offenders straddle jurisdictions. The National Institute of Justice has long argued that such prioritization increases the chance of clearance—especially when laboratories can apply modern kits to preserved material.

What Y-STR can and cannot say

Because Y-STR profiles track patrilineal inheritance and largely avoid recombination, a match indicates membership in a paternal lineage rather than proving a singular identity. In courtroom terms, the probative weight depends on two things: how rare that haplotype is within the relevant population and whether other evidence narrows the field to a particular man within that lineage. Scientific reviews emphasize both the power and the limits of the modality: it can reliably exclude non-lineage males and illuminate male contributors in mixed samples; it cannot, by itself, outpace the possibility of another paternal-line relative sharing the same haplotype, unless expanded marker panels (including rapidly mutating loci) push the lineages apart.

In the Smith closure, authorities addressed that inherent limitation by leaning on the structure of the chain—Aime’s direct STR match to Bundy—and on the non-DNA fit: Bundy’s presence, methods, and victimology in Utah in the same weeks that Smith and Aime were abducted and killed. That is the modern template for using Y-STR: a lineage signal acts as a connective thread that becomes decisive when anchored by independent identification and case context.

Authority, process, and public confidence

Summit County’s sheriff and attorney publicly endorsed the attribution to Bundy and declared the matter closed, a step multiple national outlets reported consistently. The move is procedurally significant: it signals that investigative and prosecutorial thresholds were met for attribution in a case where prosecution is impossible because the offender is deceased. In that posture, the institutional duty shifts from trial preparation to historical accountability and family notification—tasks that still demand a coherent evidentiary narrative and defensible forensics. The public messaging emphasized both: preserved evidence; the state lab’s role; the lineage logic; and the alignment with Bundy’s known activity window in Utah.

As with any forensic announcement, the scientific particulars—marker counts, haplotype frequency estimates, quality controls—live in lab documentation rather than press summaries. Cold-case readers do not need every allele table to grasp the upshot; they need to understand that lineage matches are best interpreted alongside independent anchors. Utah’s announcement followed that playbook.

Here's a remarkable cold case story.

In 1974, 17-year-old Melissa Ann Smith was murdered in Utah.

Yesterday, exactly 52 years after her body was discovered, investigators announced they'd finally identified her killer: Ted Bundy.

Yeah, THAT Ted Bundy.

DNA evidence preserved…

— BluByU (@Udntnonutn) October 28, 2026

Implications for cold-case work

The Smith closure underscores three durable lessons. First, evidence preservation is policy, not luck; cases like this vindicate long-horizon storage and disciplined chain-of-custody. Second, method pluralism—autosomal STRs where feasible, Y-STRs for male-line signal in challenging samples—expands the solvability frontier of 1970s-era cases. Third, interagency cooperation matters: offenders move, evidence sits in different rooms, and no single file tells the whole story. When lab capacity and case strategy align, even notorious, well-studied offenders can be definitively tied to additional crimes, giving families answers that were once out of reach.