Despite the newfound fame and popularity generated from the TV shows, crime scene investigators are perhaps the most overlooked and under-appreciated member of the crime solving team, yet can be one of the most crucial in the success of the investigation. Most detectives will tell you that a knowledgeable and trained CSI can make or break a case, and the ones that are fully utilizing the M-Vac and its DNA collection capabilities in the evidence collection process are finding great success. Reports of crime scene investigators collecting DNA material from rocks, bricks, wigs, cement, all types of fabrics and other rough or porous surfaces are coming in on a regular basis, and helping solve crimes that otherwise may never have been solved. In 2015 alone, over 18 profiles, most from cold cases, have been able to move cases forward due to the DNA an M-Vac System collected. A number of the cases were homicides, but there were also rapes and assaults that were solved, and the M-Vac System was used to collect the DNA material from key evidence in those cases.
If there is ample DNA material present, such as in a blood spatter or a visible stain, using a traditional collection method would clearly be appropriate. However, in situations where the swabbing, cutting, taping or scraping methods have been unreliable in producing positive results it may be most effective to use the M-Vac System first line. Regardless, if the lab results come back as negative or inconclusive and you believe there was DNA material deposited on that evidence, give your case another chance by using the M-Vac. It will dramatically improve the chance to generate a DNA profile, especially on rough, porous or large surfaces.
Below is a short video of an investigative team (detective and Senior CSI) that have successfully utilized the M-Vac System in their investigations.