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The OSBI Forensic Biology Unit (FBU) is a discipline of the OSBI Criminalistics Services Division housed at two locations in the state.

Forensic Science Center in Edmond, Oklahoma

Northeast Regional Laboratory in Tahlequah, Oklahoma

The Forensic Biology Unit specializes in the identification of body fluids and deoxyribonucleic acid (DNA) analysis of samples collected in criminal investigations.







FBU Blood Picture Homepage











DNA Helix Picture FBU Homepage







Services provided by Forensic Biology Unit Include:

Serology Testing:

Identification of body fluids including


Seminal Fluid


Deoxyribonucleic acid (DNA) Analysis:

Nuclear DNA Testing (Autosomal)

Male Specific Testing (Y-STR)

Criminal Paternity Testing

Identification of Hairs for DNA


The OSBI Forensic Biology Unit analyzes evidence differentiated into the following categories:

Major Crimes

Major crimes consist of violent crimes such as assaults, sexual assaults, criminal paternity cases, and homicides.


Property Crimes

Property crimes consist of crimes that are non-violent such as burglaries and auto-theft.

Property Crimes Button


Cold Case 

Cold cases are cases in which all reasonable leads have been exhausted.


Cold Case Button


Combined DNA Index System (CODIS)

The Forensic Biology Unit works in conjunction with the Combined DNA Index System (CODIS) Unit to enter appropriate evidentiary samples into the National DNA Index System (NDIS).

The CODIS Unit also processes convicted offender samples from the State of Oklahoma for entry into the national database.


CODIS Button


Specific Requirements for Evidence Submittal for the Forensic Biology Unit:

The following are case requests that are typically not accepted in the OSBI Forensic Biology Unit:

  • Animal and plant DNA analysis
  • No suspect DNA analysis which do not meet CODIS eligibility requirements
  • DNA analysis of controlled substance evidence
  • Sexual assault cases where suspect admits to intercourse
  • Felon in possession of firearms
  • Touch DNA analysis when the item is known to been handled without gloves during or after collection 
  • Contact DNA analysis on airbags

All DNA requests should be submitted with known reference samples from the victim(s), suspect(s) (if applicable), and exclusionary samples as necessary.

For exceptions to cases typically not accepted, please contact:

Andrea Swiech, Director of Forensic Science Services


Jim Stokes, Forensic Biology Discipline Criminalistics Administrator


The Evidence Acceptance Requirements and Service Limitations can be found here.