The Combined DNA Index System (CODIS), was created to store and exchange DNA profiles on a local, state, and national level. CODIS can compare DNA to DNA already existing in its database, therefore can identify criminals.
A DNA profile can be determined by biological material such as blood, semen, saliva, urine, feces, hair, teeth, bone, tissue and cells. Investigators will collect any item that could have been touched by the criminal.
How it is Done:
for DNA Evidence
The process of releasing the DNA from the cell.
The process of determining how much DNA you have.
The process of producing multiple copies of the DNA in order to characterize it.
The process of separating amplified DNA product to permit subsequent identification.
Analysis and Interpretaion
The process of quantitatively and qualitatively comparing DNA evidence samples to known DNA profiles.
The process of reviewing analyst reports for technical accuracy.
How it is Used
DNA can be used to solve crimes, but it could also be used to exonerate criminals. Since 1989, 362 exonerations have happened in the US due to DNA evidence.