The Blog of Science

Forensic DNA studies are a fundamental piece in helping crime investigations, but it is rarely realized that obtaining a DNA profile to be used in a court trial is the finalization of a long and difficult process involving the collection and careful process of items that may carry useful evidence. The initial collection and management of evidence is carried out by specialized police staff that are the first to arrive at the crime scene. Later, an initial screening is made to analyze the evidence and find stains or other traces of evidence. Collected elements, such as hair and cloth fibers need to be preserved with minimal handling to prevent contamination with the investigators’ own DNA. Stains coming from body fluids are first tested to know more about the quality and quantity of the biological material. This will help to decide which samples are best to be employed for DNA analysis. For example, a t-shirt with red stains is collected at a crie scene. Before going into expensive and time-consuming DNA tests, it is important to learn wheter the stain is made of blood or not. The initial testing for blood will easily answer this question and then DNA test are performed if needed.
Sorenson Forensics routinely provide forensic DNA casework services for many agencies. These services are carried out by highly experienced staff. They are certified to perform serological testing for blood, semen and saliva on forensic evidence. These steps of biological screening are usually very time consuming, but is important to ensure that every potential piece of evidence is identified and properly handled and preserved. Sorenson Forensics also provide high quality forensic service to the general public. Consult their website for detailed information on how to order a forensic analysis and properly handle and submit the samples.