FSL, WB, located at Belgachhia in north Kolkata, conducts tests in its laboratory on various exhibits seized from the scene of crimes by the investigating agencies like the Police. Exhibits related to cases like arson, burglary, firing, poisoning, rape etc. are routinely referred to the FSL, WB. The findings of the tests often provide forensic evidence related to the crimes committed. These evidence helps the investigating agencies to prove the guilt of the person(s), who committed the crimes, before Courts of Law.