The Court of Appeals, in an extensive opinion by Judge DiFiore, over an equally extensive three-judge dissenting opinion, determined the results of DNA testing, which matched defendant's DNA to that found on a weapon, should not have been admitted based solely on the testimony of a laboratory analyst who did not witness crucial aspects of the testing. The evidence was deemed “testimonial” requiring the People to produce a witness with first-hand knowledge who can be cross-examined about essential aspects of the analysis:
Here, there was a criminal action pending against defendant, and the gun, found in the basement of a multifamily dwelling where defendant lived, was evidence seized by police for that prosecution. Swabs from the gun were then tested by an accredited public DNA crime laboratory with the primary (truly, the sole) purpose of proving a particular fact in a criminal proceeding — that defendant possessed the gun and committed the crime for which he was charged. The testing analysts purposefully recorded the DNA profile test results, thereby providing the very basis for the scientific conclusions rendered thereon. Under these circumstances, the laboratory reports as to the DNA profile generated from the evidence submitted to the laboratory by the police in a pending criminal case were testimonial. The DNA profiles were generated in aid of a police investigation of a particular defendant charged by an accusatory instrument and created for the purpose of substantively proving the guilt of a defendant in his pending criminal action. * * *
… [W]e conclude that it is the generated numerical identifiers and the calling of the alleles at the final stage of the DNA typing that effectively accuses defendant of his role in the crime charged. … [A] laboratory that uses a … multiple-analyst model, may adapt their operation so that a single analyst is qualified to testify as to the DNA profile testing. For example, an analyst who generated the DNA profile from one sample may also observe the final stage of testing or retesting involved in the generation of the other profile. Nor do we suggest that, when the testing analysts are unavailable, a fully qualified … expert … cannot testify after analyzing the necessary data, including an independent analysis of the computer imaging from the software used for calling the alleles and recording their separate and distinct analysis. Thus, the claim of a need for a horde of analysts is overstated and a single analyst, particularly the one who performed, witnessed or supervised the generation of the critical numerical DNA profile, would satisfy the dictates of Crawford [541 US 36] and Bullcoming [564 US 647]. People v John, 2016 NY Slip Op 03208. CtApp 4-28-16