DNA Evidence Service
DNA Evidence Service

DNA evidence is playing a larger role than ever before in criminal cases throughout the country, both to convict the guilty and to exonerate those wrongly accused or convicted.DNA evidence in the form of saliva, blood, skin tissue, hair, and semen are often recovered from crime scenes and can be crucial to the investigation of sexual assaults and other violent crimes.

Our staff works hard to make the DNA Identity Testing Center your choice of provider for all DNA testing services. We ensure superior quality, service and convenience to our clients. In our commitment to providing convenience, please know that we provide a free DNASwabTM Home DNA Collection Kit for use in all types of private DNA tests.

The Value of DNA Evidence
The Value of DNA Evidence
DNA is a powerful investigative tool because, with the exception of identical twins, no two people have the same DNA.DNA evidence collected from a crime scene can link a suspect to a crime or eliminate one from suspicion in the same way that fingerprints are used. DNA also can identify a victim through the DNA of relatives if a victim's body cannot be found.
DNA Testing Methods
Three methods are currently used to analyze DNA evidence. The technology used in analyzing DNA evidence is increasing in sophistication and in its ability to distinguish individuals. The most common form of DNA analysis is called polymerase chain reaction (PCR).The other two methods used to analyze DNA evidence are restriction fragment length polymorphism (RFLP) testing and PCR testing on DNA from the mitochondria of the cell.
The PCR Process
The PCR process works by taking very small amounts of DNA from biological evidence and making millions of copies of it. This process, often referred to as PCR amplification, creates enough DNA to allow a laboratory analyst to generate a DNA profile.Because of the capability of PCR testing to amplify very small quantities of DNA, extreme care must be exercised to prevent contamination when identifying, collecting, and preserving biological evidence.
RFLP
RFLP
RFLP testing usually requires a sample that has 100,000 or more cells (such as a dime-sized bloodstain) and contains DNA that is not degraded or broken into smaller fragments.
Mitochondrial DNA Testing
PCR testing on DNA from the mitochondria of the cell is conducted on samples that are unsuitable for RFLP or PCR nuclear DNA testing (such as dried bones or teeth, hair shafts, or samples that contain very little or highly degraded nuclear DNA). Mitochondrial DNA testing is available only in a limited number of laboratories primarily because of the time it takes to perform the tests.
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