How forensics helped solved cold cases

Forensic Science provides analysis in organic and inorganic analytical chemistry, nuclear science, biochemistry, and genetics useful for supporting law enforcement. It involves numerous techniques and analysis to provide justification and proof of evidence to a crime. Forensic evaluate the evidence retrieved from the crime scene, and undergo different strategies depending on what type of evidence and the type of process it will undergo.

Forensic serology is the process of studying or determining of the type and characteristics of blood, it also includes bloodstain examination, blood testing and preparation of testimony or presentations at trial. Forensics who conducts this type of examination is called forensic serologist, they analyze semen, saliva, and other body fluids. These fluids may or may not be involved with DNA typing. However, in the crime labs, there is no clear distinction between job title and job function.

Some of the laboratory may not have a serologist staff, functions of the serologist is being performed b a criminalist, a biochemist, a forensic biologist, or other technician. In the criminal justice today, the most common, and the most important evidence is blood. There is no substitute for it, even in the medical or forensic purposes. The existence of blood always associates suspects and victim to one another and the scene of violence. Blood stain patterns are used to provide information on the position and movement during the crime; it identifies who struck first, in what manner, and how many times.

This will help on eliminating the most common alibi and self-defense issue for a crime. Criminals have tried many ingenious ways to remove, clean up, or even hide blood evidence, but criminal justice technology make sure that they are one step ahead of them. Blood has always been considered class evidence in forensic law. However, the potential exists for individualized blood typing. It can provide testimony with strong possibility estimates leading to a single individual, to a bloodstain.

Although identical twins may have the same DNA profile but they always differ in antibody profiles. DNA Analysis In terms of analyzing evidence, the introduction of forensic DNA analysis in 1985 has raise its importance as perhaps the greatest advance in forensic science. Until now, millions of forensic DNA test have been conducted in the United States and around the world. It replaces the laborious process of analyzing DNA that can take weeks or even months to a procedure that can be completed in a matter of two days.

Innovations and new applications have appeared like mushroom with a breathtaking speed, as microchip and miniaturization advances are being combined with the analytic techniques of DNA analysis that can produce impressive and new capabilities. With these technology advancement in forensic DNA analysis has tremendously ended the careers of serial rapist and serial killers, the problem in identifying the remains of soldiers missing in action was also given solutions. DNA analysis today can even get entire profile of an individual even with a small sample, even decomposed or degraded sample.

DNA can also be used to link case together, if forensics is able to find same semen in two separate rape case. We can conclude that we have a serial killer Today, police commonly use DNA analysis and other technologies. They are now less dependent on traditional techniques of crime solving methods that have fallen into unacceptable state, such as interrogation, relying on witness identification and taking information from informers. We can say that this method is much more reliable and efficient than that of the traditional methods.