The Oklahoma State Bureau of Investigation is a professional law enforcement agency that performs many functions in order to fulfill its mission of ensuring the safety and security of the citizens of Oklahoma. OSBI special agents investigate major crimes and assist when requested by a statutory requestor. OSBI also operates several specialized units such as Crimes Against Children, Polygraph, Forensic Video/Audio Analysis, and the Crimes Information Unit. Criminalists assigned to OSBI’s Forensic Science Services utilize cutting-edge technology to perform forensic analysis in toxicology, serology, latent print, forensic biology/DNA, and firearms and toolmarks for law enforcement agencies throughout Oklahoma. OSBI is Oklahoma’s repository for fingerprints, criminal history information, and crime reporting. The OSBI Self-Defense Act Unit administers the licensing of Oklahoma residents to carry a handgun.