How Reliable is DNA Testing in Forensic
Forensic investigators rely to a larger extent on the DNA information collected from a crime scene to enhance their investigations or provide concrete evidence that will close their case, however, the use of DNA information as evidence is marred with series of issues that question the reliability of the process of collecting the highly susceptible DNA where a slight mistake can lead to a wrong prosecution, therefore, admissibility of DNA results as evidence of a crime in a court of law is seriously considered to ensure all procedures were followed correctly and DNA tests were conducted by a reliable DNA test lab. In case you find yourself accused of a crime with DNA as the main evidence, hire an experienced and professional criminal defense attorney who is familiar with DNA cases and processes, such attorney knows all the techniques involved in DNA collection and testing and can question the reliability of the process which can question the reliability of DNA testimony in your criminal case. Although the use of DNA tests as evidence continues to become popular because of its matched ability to identify criminals, DNA cases are highly susceptible to errors, this article has outlined some common sources of these errors so keep reading this article.
The reliability of DNA results can be influenced by how the DNA was collected from the crime scene or the individual, the truth is even when a prosecutor is acting in good faith there are various points the highly susceptible DNA can get damaged, contaminated, compromised or even destroyed, this may happen during DNA collection, imagine all people who are involved at the crime scene police, witnesses, forensic detectives, and law enforcement support personnel, it can be difficult to tell how careful all these people were during DNA collection to avoid contamination or damage of the delicate DNA evidence.
Given that DNA evidence is mainly collected from semen, blood stains, dead skin, hair, etc is not easy to prove in a courtroom that the amount collected was enough to provide reliable evidence that is admissible in court, a criminal defense attorney can ask for evidence that ensured the DNA was not compromised or destroyed by exposure to sunlight or cold, police may also be required to prove that the DNA was from the guilty party because it can be from an innocent person can be at the crime scene and the DNA used against the individual, all these possibilities make it challenging to use DNA as evidence in crime scene because they are possibilities of forensic investigators and the team getting it wrong even when they are careful with the whole process.
Human beings have over 99.9 percent DNA similarity with 0.1 percent being distinct to a specific individual, this makes it challenging for the forensic team to use DNA collected from a small sample in a crime scene which may be compromised or damaged as evidence, however, with modern technology reliability of finding the distinct 0.1 percent DNA from a small sample has seen DNA evidence becoming more and more admissible in courtroom. Those are some reasons why forensic investigators find it complex to use DNA as evidence in criminal cases.