DNA Unit


DNA Unit


The Forensic DNA Unit analyzes biological material found at a crime scene, or evidence associated with a criminal investigation submitted by law enforcement agencies, criminal attorneys’ and coroner office in St. Tammany Parish. Analysts in this unit perform the following functions:


• Screen evidence for biological fluids submitted by an investigating agency

• Extract DNA from evidentiary and known samples

• Quantitation procedure to determine the amount of DNA in samples

• Amplify DNA using polymerase chain reaction (PCR)

• Examine DNA data generated from a Genetic Analyzer

• Compare unknown profiles obtained from evidence to known elimination profiles

• Input DNA profiles in a DNA database known as Combined DNA Index System (CODIS)

• Courtroom testimony


St. Tammany Parish Coroner’s Office DNA is a local database user of CODIS which uploads samples to the state level. The state uploads eligible DNA profiles to the national level. The CODIS database houses DNA profiles of individuals collected in accordance with Louisiana law. CODIS is an investigative tool that compares DNA profiles collected from crime scenes to other DNA profiles in the database. CODIS can also be used in identifying human remains.