The Department of Laboratories and Research, a part of Westchester County, provides a range of scientific testing solutions in the fields of criminal evidence and public health. It operates an environmental, disease surveillance, and forensic and toxicology divisions. The department s forensic division, also known as crime lab, provides examination of a variety of evidentiary materials, such as blood, tissue, drugs, footwear impressions, fibers, hairs, glass and chemical agents. The department specializes in the areas of pharmacology, physiology, pathology, and analytical and organic chemistry. It additionally offers bacteriological, inorganic, organic and radiological testing services. The department also provides laboratory training solutions, including diagnosis of viruses, mycobacteria, mycoplasma, ureaplasma, pneumocystis and sexually transmitted diseases. It offers services to government agencies, health officials, engineers, hospitals, schools, businesses and lawyers. The Department of Laboratories and Research is located in Valhalla, N.Y.