DNA Profiling

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.

Latent Fingerprints on Fabric

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.

FBI Fingerprint Card

The FBI provides a service which gives individuals an identity history summary using their ‘fingerprint card’. What this proves is the individual’s criminal history, if there are any crimes committed.  If any crimes are found to be related to that individual then details including: agency that submitted the fingerprints, date of arrest, the arrest charge and disposition of the arrest can be found on the identity history summary

CODIS &NDIS (FBI Laboratory Services)

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)

Trace Evidence Analysis

Trace evidence is usually found when two objects touch or when small particles are disbursed by an action or movement allowing them to persist on individuals and items. Moreover, trace evidence is typically a microscopic substance with unique and identifying features. When these microscopic substances are recovered some sort of forensic analysis has to be carried out to examine the unique features of these given particles. The types of evidence we will look at specifically are the most common which include: glass, fibres and hairs.