Science and Technology using the D.N.A. Profiling Test in Judicial System

Abstract

In the field of forensic science, DNA analysis plays a crucial role in sexual assault cases involving physical contact or the exchange of bodily fluids. However, its effectiveness can be significantly constrained within the criminal justice system. This study discusses a specific case in which short tandem repeat DNA typing was utilized to charge a defendant with the sexual assault of a child. The state’s DNA technician examined the victim’s undergarments and reviewed the victim’s sexual assault nurse examination (SANE) report. Our independent evaluation of the state’s forensic laboratory work revealed that the samples used to establish a DNA match between the victim and the defendant, as presented by us in our capacity as expert witnesses, were in question. The trial judge’s decision
restricted what the jury could hear concerning our findings, and the defendant was ultimately found guilty. The defendant subsequently appealed the guilty verdict, based on the trial judge’s decision to limit the testimony of the defense’s expert witnesses. In accordance with established legal precedent, the appellate court upheld the conviction, asserting that a victim’s testimony alone, whether supported by corroborating forensic evidence or not, could justify a finding of guilt.