Although DNA evidence is by far the highest regarded technological advances in Forensic Techniques securing convictions of criminal justice cases, the popularity created backlogs of cases needing DNA evidence testing procedures to accelerate for expediency creating suggestive judicial hardships for a confirmation to prevail in a criminal justice system’s financial criteria for success.
Major reason for the backlog of DNA analysis is its popularity creating a need to lobby and requisition stronger funding resources. These funding resources would manipulate a large gamut of criteria associated with all aspects within the criminal justice system.
The time involvement in DNA analysis will be accentuated by proposed technologies with avenues of time-expedient propositions for lab productivity as priority in the advanced technological pursuits.
DNA prioritized research efforts will include:
Increase for speed and resolution
Superior technological efforts for more conducive analysis of degraded or aged and compromised or contaminated evidence
Development and implementation of microbial DNA analysis for recovery of DNA located near perpetrators and victims (ecological recoveries)
Identification for vast conclusive samples of evidence obtained from incidents of mass disasters or mass fatality incidents
Also suggested for further DNA enhancement technologies:
Officer training for the proper and appropriate preservation of evidence null of contamination, including advisement of appropriate recognition of potential evidence
Core training and evidence collection requirements will be mandated on a federal level for all personnel involved in crime scene investigations
Attorney General’s implementation of training programs encompassing all individuals involved in the criminal justice system including, Prosecutors, Defense Attorneys and Judges.
The successful isolation and analysis of DNA evidence is limited to samples of a biological nature. Therefore, careful attention is necessary at the crime scene for the collection, preservation, and transportation accordingly.
Environmental factors, as well as, DNA evidence ability to deteriorate is the deciding factor for success of obtaining DNA classification requiring priority collection and storing techniques.
All physical, biological materials can be successfully analyzed for DNA. It is advisable to note that all biological evidence is easily transferable acknowledging special recommendations and instruction to secure and protect the crime scene.
The quantity of the sample of evidence should be considered to ascertain it is sufficient for investigative location of recovery in order to run DNA testing. At the same time, restrictions apply to collecting evidence of dirt, grease and fluids because these substances adversely affect the DNA process.
There are established forensic guidelines for packaging specimens. Immediately after collection and packaging, samples should be transported to the laboratory. Storage of DNA is necessitated by utilizing cool and dry environmental conditions, although there are indications where transporting evidence is necessary for room temperatures. Collection of reference samples is necessary for comparison and should be taken from both the victims, as well as, the suspects.
Packaging requires very, although it is necessary to ascertain evidence is individually packaged with the availability of dry containers. Plastic bags are never to be used because of residual moisture that accumulates when packaged.
As in all processing of evidence collected at the crime scene, labeling should consists of date, time, name, location, investigator’s name, case number, and exhibit number establishing the foundation for the chain of custody. Chain of custody dictates each individual who had access to the evidence from the time the evidence leaves the crime scene and throughout its transport.
Careful consideration needs to be acknowledged to prevent contamination of DNA when collecting properly by investigators to prevent the transfer of their DNA to the evidence. Proper attire such as gloves, masks, and in certain instances, clothing should be considered.
“The ability to perform successful DNA analysis on biological evidence recovered from a crime scene depends very much on what kinds of specimens were collected and how they were preserved. Thus, the technique used to collect and document such evidence, the quantity and type of evidence that should be collected, the way the evidence should be handled and packaged, and how the evidence should be preserved, are some of the critical points for a forensic DNA testing program (Catalin, Anghel, Mitrascu).”
Marian Catalin, Anghel Andrei, Ona Mitrascu, “Modern Methods of Collection and
Preservation of Biological Evidence for Human Identification by DNA Analysis,
Retrieved from: www.abacusdiagnostics.com/Modern_Methods_of_Collection.pdf