A Testifying DNA Analyst May Interpret Non-Testimonial Raw Laboratory Data Without Calling Every Testing Technician

Introduction

Timothy McQueary was convicted of first-degree rape, four counts of first-degree sodomy, three counts of first-degree sexual abuse, four counts of incest, and intimidating a participant in the legal process. The charges arose from the sexual abuse of S.C., his wife’s minor child. The Jefferson Circuit Court imposed an aggregate thirty-year prison sentence.

On appeal as a matter of right, McQueary challenged: (1) testimony by a DNA analyst who interpreted testing performed by other laboratory personnel; (2) the chain of custody for the DNA evidence; (3) medical testimony recounting statements made by S.C. and her mother; (4) restrictions on impeachment and cross-examination of S.C.; and (5) the alleged cumulative effect of those claimed errors.

The Supreme Court of Kentucky rejected each argument and affirmed all convictions.

Summary of the Opinion

• DNA testimony: No Confrontation Clause violation occurred because the unidentified technicians produced only raw testing data and made no testimonial conclusions. Rebecca Williams independently analyzed that data, prepared the relevant report, testified at trial, and was cross-examined.
• Chain of custody: The Commonwealth established a reasonable probability that the DNA samples remained materially unchanged. It was unnecessary to identify every laboratory employee who handled them.
• Medical hearsay: Statements made to Dr. Rebecca Hart were admissible under KRE 803(4) because they were reasonably pertinent to medical diagnosis and treatment. The physician did not identify McQueary as the perpetrator.
• Cross-examination: McQueary adequately exposed inconsistencies between S.C.’s testimony and her Child Advocacy Center interview. Playing the interview video would have been cumulative, and questioning the interviewer about an undisputedly accurate transcript was only marginally relevant.
• Cumulative error: Because the Court found no individual error, there was no cumulative error.

Analysis

1. Confrontation Clause and DNA Analysis

The opinion’s most significant principle concerns multi-person forensic testing. Williams did not personally handle the samples or conduct the laboratory testing. Technicians in Florida generated the raw results, which were sent to Williams in Minnesota. Williams then interpreted the data, made comparisons, calculated likelihood ratios, and prepared the report used at trial.

The Court distinguished between:

• an absent analyst who makes testimonial conclusions intended for use in a prosecution; and
• technicians who generate raw, machine-produced data without expressing conclusions about the defendant.

Because Williams was the person who converted the raw data into a DNA profile and concluded that McQueary could not be excluded as a contributor, she was not merely a surrogate repeating another analyst’s opinion. She was the relevant declarant, appeared at trial, and underwent extensive cross-examination.

Precedents Cited

Smith v. Arizona

The prosecution in Smith used a substitute expert to present the conclusions of an absent analyst. The United States Supreme Court held that a testifying expert cannot evade confrontation requirements by relaying another analyst’s testimonial statements. The Kentucky court distinguished Smith because Williams performed the decisive analysis herself rather than simply reading or endorsing an absent analyst’s conclusions.

Melendez-Diaz v. Massachusetts

Melendez-Diaz held that sworn certificates identifying substances as cocaine were testimonial statements and that the analysts who prepared them were witnesses subject to confrontation. Unlike those certificates, the raw data in McQueary’s case contained no human conclusion about the evidence.

Bullcoming v. New Mexico

In Bullcoming, a substitute analyst could not introduce a forensic report prepared and certified by another analyst who performed the blood testing. The present case differed because Williams authored the interpretive findings, while the technicians did not make testimonial certifications or conclusions.

Baldwin v. Commonwealth

Baldwin provided the closest Kentucky analogy. There, a Cellebrite employee extracted raw cellphone data, but law-enforcement witnesses performed the analysis and testified. The extraction was non-testimonial because it contained machine-generated data rather than conclusions. Applying that reasoning, the Court held that Williams could testify from raw DNA data generated by technicians who made no testimonial assertions.

The decision does not create a blanket rule that every reviewing DNA analyst may testify. Its reasoning depends on the characterization of the absent technicians’ work as purely preparatory and non-testimonial. If absent personnel exercise interpretive judgment, certify results, or make assertions intended to prove a fact at trial, Smith v. Arizona, Melendez-Diaz v. Massachusetts, and Bullcoming v. New Mexico may require their presence.

2. Chain of Custody

DNA evidence is fungible and susceptible to contamination or misidentification, so the Commonwealth had to establish that the tested samples were the same samples collected during the investigation and had not been materially altered. The Court nevertheless emphasized that the law requires reasonable assurance, not a perfect account of every transfer.

Goodyear Tire and Rubber Co. v. Thompson

This case establishes abuse of discretion as the standard for reviewing evidentiary rulings.

Commonwealth v. English

An abuse of discretion occurs when a ruling is arbitrary, unreasonable, unfair, or unsupported by sound legal principles.

Thomas v. Commonwealth

Thomas explains that the required evidentiary foundation varies with the nature of the item. Fungible evidence requires a more developed foundation, but every possibility of tampering need not be eliminated.

Rabovsky v. Commonwealth

Under Rabovsky, gaps in the chain ordinarily affect the weight of the evidence rather than its admissibility when a reasonable probability exists that the evidence was not materially altered.

State v. Price

The Court relied on State v. Price for the proposition that the prosecution need not document every hand-to-hand transfer if the evidence supplies reasonable assurance that the item’s condition remained unchanged.

U.S. v. Graham

U.S. v. Graham supported treating the adequacy of the chain as a factual matter ultimately evaluated by the jury after the foundational threshold is met.

Milby v. Mears

The Court invoked Milby v. Mears in declining to construct McQueary’s undeveloped argument that presenting chain-of-custody proof in a nonlinear order was independently erroneous.

Testimony from Williams, Detective Livers, and Kentucky State Police analysts established a reasonable probability that the samples remained intact. Williams’s inability to name every DLI employee went to evidentiary weight, not admissibility. The order in which witnesses supplied the chain also did not invalidate the proof.

3. Statements Made for Medical Diagnosis or Treatment

KRE 803(4) permits statements made for medical diagnosis or treatment when they describe medical history, symptoms, or the cause of an injury insofar as reasonably pertinent to care. Dr. Hart testified about information obtained from S.C. and Dottie when deciding the scope of the examination, whether to use a sexual-assault kit, and whether additional testing was needed.

Colvard v. Commonwealth

Colvard explains that reliability comes from the patient’s motivation to obtain appropriate treatment. It also states the general rule that a perpetrator’s identity is not ordinarily relevant to diagnosis or treatment.

Hoff v. Commonwealth

Hoff limits the exception in child-sex-abuse cases primarily to statements concerning injuries and their cause when relevant to treatment.

Sharp v. Commonwealth

Sharp recognizes the substantial prejudicial force that hearsay may acquire when repeated by a professional witness, requiring careful application of the exception.

Hartsfield v. Commonwealth and Manery v. Commonwealth

These cases concern circumstances in which interviews by medical professionals may function as evidence-gathering for law enforcement. The Court found them distinguishable because Dr. Hart was acting in the ordinary course of medical treatment.

Commonwealth v. McKee

Commonwealth v. McKee helped distinguish medical care from formal interviews conducted in cooperation with police for prosecutorial purposes.

The statements explaining why S.C. came to the hospital were pertinent to determining the necessary examination. Statements about threats were relevant to delayed reporting and whether fresh trauma was likely to be present. Most importantly, Dr. Hart did not name McQueary as the abuser. Her reference to Dottie’s “partner” did not attribute the abuse or threats to him.

4. Limits on Cross-Examination and Impeachment

McQueary confronted S.C. with a transcript of her Child Advocacy Center interview and repeatedly highlighted differences between that interview and her trial testimony. He later sought to play portions of the recorded interview and to have interviewer Becky Lee verify the transcript.

The Court held that the transcript had already given the defense an adequate opportunity to expose the inconsistencies. The video would have added no meaningful impeachment value and was cumulative. Testimony from Lee verifying an undisputed transcript would have been marginally relevant and risked becoming improper commentary on S.C.’s credibility.

Roberson v. Commonwealth

A defendant has the right to present a complete and meaningful defense, but that right does not displace the rules of evidence.

Daugherty v. Commonwealth

Daugherty recognizes a defendant’s ability to present evidence and construct the most convincing available defense, subject to lawful evidentiary limits.

Bratcher v. Commonwealth

Bratcher confirms broad trial-court discretion over cross-examination and supports excluding a videotape that would merely duplicate impeachment already achieved.

Meece v. Commonwealth

Meece explains that inconsistency includes more than directly opposite answers; it can arise from evasiveness, inability to recall, silence, or a changed position.

Newcomb v. Commonwealth

Newcomb permits reasonable limits based on harassment, prejudice, confusion, safety, repetition, or marginal relevance, provided the limits do not undermine essential elements of the defense.

Commonwealth v. Armstrong

This case recognizes cross-examination as a core protection of the Sixth Amendment’s Confrontation Clause.

Commonwealth v. Maddox

Maddox requires caution when restricting credibility evidence and protects the defendant’s ability to present a reasonably complete picture of a witness’s veracity, bias, and motivation.

The Court concluded that McQueary received that constitutionally sufficient opportunity. The Sixth Amendment guarantees effective cross-examination, not unlimited use of repetitive evidence.

5. Cumulative Error

Brown v. Commonwealth

Brown recognizes that multiple individually harmless errors can require reversal when their combined effect renders a trial fundamentally unfair. The individual errors must ordinarily be substantial and close to prejudicial.

Funk v. Commonwealth and Furnish v. Commonwealth

These cases reinforce that cumulative error does not arise merely by adding together claims that produced no actual prejudice.

Because the Court identified no underlying error, the cumulative-error doctrine did not apply.

Complex Concepts Simplified

• Confrontation Clause: A criminal defendant generally has the right to question people whose testimonial statements are used against him.
• Surrogate analyst: A witness who did not perform or independently analyze the relevant work but merely repeats the conclusions of an absent forensic analyst.
• Raw machine-generated data: Uninterpreted instrument output. The Court treated it as different from a human analyst’s factual certification or opinion.
• Likelihood ratio: A statistical comparison describing how much more likely a DNA result is under one proposed explanation than another. It is not itself a statement that the defendant is guilty.
• Chain of custody: Evidence showing that an item collected during an investigation is the same item tested and presented at trial, without material alteration.
• Hearsay exception: A rule permitting certain out-of-court statements because the circumstances provide sufficient reliability, such as statements reasonably made to obtain medical treatment.
• Impeachment: Evidence used to challenge a witness’s accuracy or credibility, including proof of prior inconsistent statements.
• Cumulative evidence: Additional evidence that merely repeats a point already adequately established.
• Abuse of discretion: A decision that is arbitrary, unreasonable, unfair, or unsupported by sound legal principles.

Potential Impact

Although nonbinding, the opinion illustrates how Kentucky courts may apply Baldwin v. Commonwealth to modern forensic laboratories in which different employees perform testing and interpretation. Prosecutors may not necessarily need to call every technician involved in a multi-stage process when those technicians only generate raw data and the testifying analyst independently performs the interpretation.

The distinction remains fact-sensitive. Future defendants may still establish a confrontation violation by showing that an absent technician made certifications, exercised interpretive judgment, selected or altered relevant data, or produced conclusions for use at trial.

The opinion also reinforces three established evidentiary principles: minor chain-of-custody gaps ordinarily affect weight rather than admissibility; medical statements must be tied to diagnosis or treatment; and trial courts may stop repetitive impeachment once the jury has received a reasonably complete basis for evaluating credibility.

Conclusion

The Supreme Court of Kentucky affirmed McQueary’s convictions and thirty-year sentence. Its central forensic ruling is that a testifying analyst who independently interprets non-testimonial raw laboratory data is not an impermissible surrogate merely because other technicians generated the underlying data. The opinion also confirms that evidentiary foundations require reasonable reliability rather than perfection and that confrontation rights do not compel admission of repetitive impeachment evidence.

Because the opinion is unpublished, these conclusions are not binding precedent. They nevertheless provide persuasive guidance on the intersection of forensic teamwork, testimonial hearsay, chain of custody, medical statements, and the permissible scope of cross-examination.