STATE OF NEW JERSEY VS. DANIEL ROCHAT (13-07-1002, BERGEN COUNTY AND STATEWIDE) (A-0103-17)
This appeal presents an issue of first impression—whether DNA evidence obtained from extremely small amounts of DNA through a technique known as low copy number (LCN) DNA testing, and in one instance, by using a proprietary Forensic Statistical Tool (FST) software program, which defendant contends are not generally accepted in the relevant scientific community, was improperly admitted at trial.
Defendant was indicted for the murder of a woman he had recently visited, that worked at his father's business. Her partially burned body was found in her residence. She died from blunt force head injuries. As part of their investigation, detectives obtained DNA samples from defendant, his apartment, a condominium that he had access to, his car, and the victim's fingernails. Samples from the kitchen of the apartment tested positive for blood. The DNA samples were sent to a laboratory DNA analysis.
The trial court denied defendant's motion for a Frye1 hearing to determine the admissibility of the LCN DNA test results. At trial, the State's experts testified that DNA samples from the kitchen was consistent with the victim's DNA. Analysis of a second set of DNA samples showed a mixture of DNA from two people, one of whom was the victim. DNA samples from the victim's home did not test positive for defendant's DNA, but samples taken from the victim's fingernails did. Samples from defendant's apartment and car did not test positive for the victim's DNA. Defense experts opined that the LCN DNA testing and FST were neither reliable nor generally accepted in the relevant scientific community. Defendant was found guilty of the murder.
On appeal, the court remanded the case for a Frye hearing to determine the admissibility of the disputed DNA evidence under the standards adopted in State v. Harvey, 151 N.J. 117 (1997), and retained jurisdiction.
Following a multi-day Frye hearing, at which numerous expert witnesses testified, the trial court determined the State clearly established that the LCN DNA testing technique and FST were generally accepted in the relevant scientific community and ruled the DNA analysis was admissible.
The court rejected the trial courts determinations, concluding that the State did not clearly establish that the LCN DNA testing technique and FST were generally accepted in the relevant scientific community. Therefore, the DNA evidence derived by using that technique and software was inadmissible. Noting that the remaining evidence was not overwhelming and recognizing that DNA evidence is powerful and compelling, the court determined that admission of the disputed DNA evidence raised a reasonable doubt that the jury was led to a verdict it otherwise might not have reached. Because the error was not harmless, the court reversed defendant's conviction and remanded for retrial.
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1 Frye v. United States, 293 F. 1013 (D.C. Cir. 1923).
