Final answer:
DNA evidence is highly effective in the criminal justice system due to its unique nature and the ability to precisely match a suspect with biological evidence. In contrast, eyewitness testimony is prone to inaccuracies and misidentifications, which can lead to wrongful convictions. DNA is one of the most reliable forms of evidence in legal matters.
Step-by-step explanation:
The effectiveness of DNA evidence in the criminal justice system is considerably higher than that of eyewitness testimony. Eyewitness misidentification has been a leading cause of wrongful convictions, as noted by the Innocence Project and supported by research from the Benjamin N. Cardozo School of Law. Human memory can be unreliable and influenced by various factors such as the suggestibility of the witness, the wording of questions, and the procedures used during lineups.
DNA provides a more objective and precise form of evidence. Each person's DNA is unique, which allows forensic geneticists to accurately determine identities or familial relationships, like paternity, by comparing DNA sequences. Furthermore, DNA can be retrieved from different types of biological evidence like hair, blood, or saliva, and even small samples can be used to match a suspect to the evidence found at a crime scene.
Given the importance of accurate identification in legal contexts, from paternity cases to crime scene analysis, the reliability of DNA is an asset in ensuring justice is served correctly. This is particularly crucial in grave situations where the consequence could be as serious as a death penalty. Hence, DNA testing is an invaluable tool for the justice system.