Biology unit biological specimens such as tissue, semen, hair, and blood are scrutinized in this area, including any DNA analysis. This unit will also look at plant samples and other botanical materials, as well as some fibers. The technicians examine guns, expended bullets, cartridge cases, and gun powder residue to provide information about effects of shooting from different distances, and matching a fired bullet to a particular gun. They may also analyze tool mark impressions. Document Examiners Documents of unknown origin include forgery analysis, bad checks, anonymous handwritten or typewritten samples, and ransom notes.
Examiners analyze authorship and authenticity, including the materials used to produce the document.
Photography All crime scenes must be photographed, including autopsies done on a homicide victim. These experts also help to assemble photographs for courtroom exhibits. The lab has different types of cameras and film, along with an inhouse darkroom. Identification Unit examining and collecting fingerprints for comparison to a database or to a suspect is the province of this unit. They may also do footprints and tire impressions.