Only a few years ago biometric identification systems were considered spy-level pieces of technology, yet now they are used more and more frequently throughout everyday life. Especially to unlock technical devices and guarantee secure access to properties and many more.
In the past, fingerprints on fabric have been very difficult to visualise due to the porous nature of the surface, especially to a quality that would be required if presented as evidence in court. Physical development methods do not work with porous surfaces, so chemical methods have been used with fabrics.
The ability to extract and create a DNA profile is one of the most valuable tools in forensic investigation. It allows a sample of biological material (such as blood, semen, tissue) collected from a crime to be almost unequivocally linked to the person of whom it originated from.
Due to polymorphic nature of DNA, the probability of finding two people with the same genetic profile is incredibly unlikely.
CODIS stands for Combined DNA Index System and is the national DNA database for the USA run by
the Federal Bureau of Investigations (FBI). It is a collective DNA database for three levels of
information in the USA: the Local DNA Index System (LDIS), the State DNA Index System (SDIS) and
National DNA Index System (NDIS)