Forensic DNA

The Forensic DNA Department consists of two sections: Casework and CODIS.


person working in a Forensic DNA LabThe Casework Section performs scientific analysis of biological samples recovered from crime scenes. DNA collection and analysis gives the criminal justice field a powerful tool for convicting the guilty and exonerating the innocent.

DNA analysis is a powerful tool because each person's DNA is unique (with the exception of identical twins). Therefore, DNA evidence collected from a crime scene can implicate or eliminate a suspect, similar to the use of fingerprints


Forensic DNA EquipmentThe Combined DNA Index System, CODIS, blends computer and DNA technologies into an effective tool for fighting violent crime. The current version of CODIS uses two indexes to generate investigative leads in crimes where biological evidence is recovered from the crime scene. The Convicted Offender index contains DNA profiles of individuals convicted of felony sex offenses (and other violent crimes). The Forensic index contains DNA profiles developed from crime scene evidence. CODIS utilizes computer software to automatically search these indexes for matching DNA profiles.

Download Information for Customers Requiring DNA Analysis (DNA Methodologies)


The Cuyahoga County Medical Examiner’s Office Forensic laboratories are accredited by ANSI National Accreditation Board (ANAB) and complies with FBI Quality Assurance Standards (QAS). These accreditations verify the reliability of our equipment, the qualifications of our laboratory staff, and the soundness of our testing methods and standard operating procedures.

Contact Information

Dr. Nasir Butt
DNA Technical Manager and Supervisor