The Department of Laboratories and Research is the behind-the-scenes agency that conducts scientific tests in matters ranging from criminal evidence to public health concerns.

In 2007, we opened a state-of-the-art DNA addition to the Forensic Lab that can analyze evidence more quickly and establish identity through DNA with the smallest of samples. In 2004, we opened an enhanced Biosafety Level 3 laboratory to identify select agents and new and emerging pathogens. This arrangement groups nearly all county laboratories under a single administrative control, thus permitting interchange of scientific knowledge, technology and data.

Whether it is analyzing crime specimens for DNA, toys for possible lead or patient specimens for TB, the department works to protect the public's health and safety.

The Office of the Medical Examiner investigates and determines cause and manner of death occurring in Westchester "due to unlawful act, criminal neglect, violence, casualties, or by sudden or unexplained circumstances." 

The Division of Environmental Services provides testing to a number of government agencies, health officials, DA's Office, engineers, hospitals, schools, businesses, homeowners, residents and others. The state-of-the-art facility and highly trained analysts provide the best in bacteriological, inorganic, organic and radiological testing. The QA/QC department ensures all reported results meet or exceed all quality standards set by New York State and the US EPA.

The Division of Forensic Sciences, commonly known as the “Forensic Lab” provides quality and timely scientific analyses of physical evidence to local, state and national entities within the criminal justice system. The division's various units examine a wide array of evidentiary materials such as items tested for the presence of DNA, controlled substances, fibers, hairs, fire debris and gunshot residue. Audio, video and image analyses are also performed.

The Division of Forensic Toxicology analyzes biological specimens for the presence of alcohol, drugs and other toxic compounds as a part of postmortem medicolegal investigations of the Westchester County Medical Examiner's Office. The Medical Examiner’s Office uses information generated by the toxicology laboratory when determining the manner and cause of death of an individual. Through the application of toxicological and pharmacological principles, the toxicologists interpret the test results in order to assist with the formation of conclusions regarding the circumstances of the death.

The Division of Microbiological Services provides diagnosis and identification of infectious agent that may cause diseases of public health significance.