The People v. Cadman Williams

New York Court of Appeals·Decided March 31, 2020·No. 15·Published

Opinion

State of New York OPINION Court of Appeals This opinion is uncorrected and subject to revision before publication in the New York Reports.

No. 15 The People &c., Respondent, v.

Cadman Williams, Appellant.

Mark W. Zeno, for appellant. Robert C. McIver, for respondent. The Innocence Project; Office of the Appellate Defender, Inc., et al.; and The Legal Aid Society, amici curiae.

FAHEY, J.:

Over 150 years ago the science of genetics was born. It grew out of the beloved garden of Gregor Mendel’s pea plants. It has come to be as important to our perception of

-2- No. 15 the modern world as the atom or the byte. This revolution in our understanding of biology extends to most aspects of medical science.

In the criminal justice system, it has provided forensic science with one of the most powerful tools for identification yet seen. DNA testing has become the “gold standard” of this process.

For this reason, more than any other, courts must use the tools available to make sure that the highest standards of reliability are maintained.

The primary issue on this appeal is whether the trial court should have held a Frye hearing (see Frye v United States, 293 F 1013 [DC Cir 1923]) with respect to the admissibility of low copy number (LCN) DNA evidence and the results of a statistical analysis conducted using the proprietary forensic statistical tool (FST) developed and controlled by the New York City Office of Chief Medical Examiner (OCME). Under the circumstances of this case, we conclude that the trial court abused its discretion as a matter of law in admitting that evidence without holding such a hearing. However, inasmuch as the error is harmless, and inasmuch as defendant’s other contentions lack merit, we ultimately conclude that the judgment of should not be disturbed.

Facts

A.

In May 2008 the victim and his brother had a dispute with several teenagers in the Bronx. That dispute ended in the death of the victim following an incident in which he swung a baseball bat at one of the teenagers. The use of the bat apparently prompted

-3- No. 15 defendant, who was present with the group of teenagers, to grab a gun and fire four bullets at the victim.

Two of those bullets struck the victim, who subsequently staggered into the lobby of a nearby apartment building and died a short time later. The medical examiner determined that one of the bullets entered the left side of the victim’s face, and that the second projectile punctured the right side of his back. The examiner also concluded that each of the wounds was fatal.

Defendant escaped the scene of the shooting and had the gun hidden in the apartment of a former girlfriend before he fled to neighboring states. Defendant eventually was arrested in Brooklyn several months later, and the gun in question was recovered from a covered wall cavity in the aforementioned apartment prior to his prosecution. At trial, the People presented evidence with respect to those facts, including eyewitness testimony identifying defendant as the shooter and video footage placing him at the scene of that incident. The People also presented testimony from defendant’s former girlfriend explaining that defendant forced her to stow the gun used in the shooting in her apartment immediately after that incident and admitted to her that “he had just shot somebody.”

Trial also saw the People present evidence with respect to DNA testing that was conducted with the goal of providing a scientific link between defendant and the subject gun. That DNA testing revealed that there was a mixture of DNA from at least two contributors on the firearm. OCME initially was unable to link defendant’s DNA profile

-4- No. 15 to the DNA found on the gun through “standard” DNA testing.1 Eventually, though, what an expert for the People characterized as a “sensitive” form of traditional DNA review (that is, the LCN testing) and a proprietary “calculator” (that is, the FST2) yielded the conclusion that it was millions of times more likely that the DNA mixture found on the gun contained contributions from defendant and one unknown, unrelated person, rather than from two unknown, unrelated people.3

1 In this context, “standard” DNA testing generally refers to the polymerase chain reaction, or PCR, technique involving 28 amplification cycles of DNA loci (see generally People v John, 27 NY3d 294, 298 [2016]). In the PCR process, a specific region of DNA is replicated over and over again to yield many copies of a particular sequence, which permits minute amounts of DNA to be examined (John M. Butler, Fundamentals of Forensic DNA Typing at 7, 125, 1260 [2009]). 2 The addendum to this opinion contains a more detailed explanation of the nature of the LCN evidence and the FST calculations in question on this appeal. 3 OCME’s findings were the culmination of a series of four reports issued over a period of approximately seven months in which OCME, respectively, (1) used PCR DNA testing to determine that mixtures of DNA from at least two people were present on the trigger and grip areas of the gun, but that the DNA profiles of individual contributors to the mixture could not be determined;

(2) determined that, based on a DNA profile developed from a buccal swab sample and a PCR analysis, defendant could not be excluded as a contributor to the mixtures found on the grip and trigger areas of the gun;

(3) determined that, based on LCN testing and an FST analysis, it was (a) 4.13 million times more probable that the DNA mixture found on the handle area of the gun originated from defendant and one unknown, unrelated person than from two unknown, unrelated contributors, and (b) 131,000 times more probable that the DNA mixture found on the trigger area of the gun originated from defendant and one unknown, unrelated person than from two unknown, unrelated contributors; and, finally, (4) following a recalculation based on additional LCN testing and FST analysis, ultimately concluded that it was (a) 125 million times more probable that the DNA mixture found on the handle area of the gun originated from defendant and one unknown, unrelated person than from two unknown, unrelated contributors, and (b) 1.97 million times more probable that the DNA mixture found on the trigger area of the gun originated from defendant and one unknown, unrelated person than from two unknown, unrelated contributors.

-5- No. 15 B.

The LCN and FST evidence did not reach the jury without protest. Prior to trial defendant had moved for an order precluding the People from introducing expert testimony regarding any conclusion reached by either the use of LCN testing or the FST on the ground that such methods were not generally accepted as reliable by the relevant scientific community. In the alternative, defendant sought an order directing that a Frye hearing be held with respect to the reliability of any proposed evidence generated through LCN and FST review. That application is the focal point of this appeal.

Defendant’s Support for the Frye Motion The LCN testing process, as noted in the addendum, obtains DNA profiles from a very minute amount of genetic material by increasing the number of amplification cycles (28 in a “standard” test, and 31 using this method) used to copy that DNA. In support of the Frye motion defendant put before the motion court, among other things, evidence in the form of an expert averment that “no generally accepted guidelines for the testing, analysis, or interpretation of LCN [had] been agreed upon by the forensic community,” and that “[t]he use of LCN testing [was] still highly debated within the forensic community due to the unreliability of the LCN profiles generated.” The same expert did “not believe that profiles generated from LCN testing [were] reliable or valid for the implementation for DNA testing associated with criminal casework” and noted that LCN testing was “not implemented within” the out-of-state laboratory in which he was employed.4

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