83 N.Y.2d 417 (1994)
Expert testimony based on novel scientific principles is admissible only after the underlying principle or procedure has gained general acceptance in its specified field, as determined by the Frye standard.
Summary
In People v. Wesley, the New York Court of Appeals addressed the admissibility of DNA profiling evidence, a novel scientific technique at the time. The defendant was convicted of murder, rape, and other crimes. The prosecution presented DNA evidence linking the defendant to the crime scene. The court affirmed the conviction, holding that DNA profiling evidence was generally accepted as reliable by the relevant scientific community in 1988 when the Frye hearing occurred, and a proper foundation was laid at trial. The Court emphasized that the Frye test, regarding general acceptance, is distinct from foundation issues relating to specific procedures used in the case.
Facts
Helen Kendrick, a 79-year-old woman, was found murdered in her apartment. The investigation focused on George Wesley, a client of the same social services organization. Caseworkers found bloodstained clothing in Wesley’s apartment. Wesley initially denied knowing Kendrick but later admitted to visiting her. He gave conflicting accounts of how his shirt became bloodied and offered an implausible explanation for Kendrick’s injuries. Microscopic analysis revealed fibers from Kendrick’s apartment on Wesley’s clothing and vice versa. DNA comparison was made of a bloodstain taken from defendant’s T-shirt, hair follicles taken from the deceased and blood drawn from the defendant, indicating a match between the blood stain and the victim’s DNA.
Procedural History
The Albany County Court convicted Wesley of second-degree murder, first-degree rape, attempted first-degree sodomy, and second-degree burglary. Prior to trial, a Frye hearing was held to determine the admissibility of DNA evidence. The trial court ruled the evidence admissible, and the Appellate Division affirmed the conviction. Wesley appealed to the New York Court of Appeals.
Issue(s)
Whether DNA profiling evidence is admissible in New York State under the Frye standard, requiring general acceptance in the relevant scientific community.
Holding
Yes, because DNA profiling evidence was generally accepted as reliable by the relevant scientific community at the time of the Frye hearing, and a proper foundation was established at trial.
Court’s Reasoning
The Court applied the Frye standard, stating that expert testimony based on scientific principles is admissible only after the principle has gained general acceptance in its field. The Court noted that while the procedure doesn’t need to be unanimously endorsed, it must be generally accepted as reliable. Expert testimony presented at the Frye hearing supported the acceptance of DNA profiling evidence. The Court emphasized the distinction between the Frye test and the foundational requirements for admitting specific evidence. The Frye test addresses the general reliability of the scientific method, while foundation concerns the specific procedures used in the case. The court found Lifecodes’ procedures to be generally accepted. Challenges to population studies used for statistical analysis of DNA matches go to the weight of the evidence, not its admissibility, and are to be decided by the jury. The Court further noted that the modern trend in evidence law moves away from imposing special tests on scientific evidence and toward using traditional standards of relevancy and expertise. A concurring opinion argued that the prosecution failed to demonstrate that Lifecodes’ protocols for determining a match were generally accepted, emphasizing the subjectivity of visual matching techniques. However, the majority found that visual matching was an accepted procedure at the time. Chief Judge Kaye, concurring in result only, argued for a stricter application of the Frye standard, particularly regarding the procedures used by Lifecodes. Kaye found the DNA evidence should have been excluded. However, she concurred in the affirmance of the conviction, finding the error harmless given the other evidence against Wesley.