How Does DNA Evidence Affect the Outcome of a Michigan Criminal Case?

DNA evidence can be one of the most powerful forms of proof in a criminal case, but it’s important to understand that its impact is not always straightforward. While its use can strengthen the prosecution’s argument, support a defense, or lead to exoneration, there are limitations and ways for it to be challenged. Continue reading for more information and secure the skilled representation of an Upper Peninsula criminal defense lawyer today.

What is DNA Evidence?

DNA stands for deoxyribonucleic acid and refers to genetic material found in most human cells. Every person’s DNA (besides that of identical twins) is unique, so it can be used to identify individuals in various ways, especially in a criminal investigation.

DNA can become evidence when biological material is collected and tested by a forensic lab. Common sources of this genetic material include blood, saliva, semen, skin cells, hair with roots, bone, teeth, and tissue.

How Does DNA Evidence Affect the Outcome of an MI Criminal Case?

DNA evidence can affect the outcome of a criminal case in a myriad of ways. Prosecutors may rely on DNA to establish a direct link between a defendant and the crime scene or victim. When DNA matching the defendant is recovered from evidence such as a weapon, clothing, or biological samples, it provides persuasive proof of the suspect’s identity. This evidence can significantly strengthen the state’s case, sometimes forming the foundation of the argument that the defendant was physically present and involved in the commission of the crime. This can increase the likelihood of a guilty verdict.

DNA evidence can be just as powerful for the defense, especially when it points away from the accused defendant. If DNA collected at the scene excludes the defendant, or if the genetic material belongs to a different suspect, it introduces reasonable doubt regarding the defendant’s guilt. A skilled defense lawyer can use these results to challenge the state’s theory, argue for misidentification, or suggest that another individual committed the offense.

Besides an initial trial, the advancement of DNA technology has become an important tool for the exoneration of convicted individuals. Post-conviction DNA testing has overturned hundreds of wrongful convictions, many of which relied on flawed eyewitness testimony or coerced confessions. If biological evidence was preserved from the original crime, testing can definitively prove that the convicted person’s DNA does not match the evidence, providing clear and compelling proof of innocence and leading to their release.

Does DNA Have Limitations in a Case?

DNA evidence is powerful but not without its limitations. Matches are based on statistical probability, not absolute certainty, so the evidence can always be challenged. Either side could also question the integrity of the evidence itself, challenging the chain of custody, collection methods, and analysis to undermine its reliability. Certain evidence could be considered circumstantial.

To learn more about how DNA evidence can be used in your case, reach out to a skilled attorney today.