This guide complements the training manual, Forensic Investigation of Clandestine Laboratories. Divided into four sections, the text provides concise information for field use along with reproducible worksheets for crime scene investigators. It includes visual representations of the scientific equipment used to clandestinely produce drugs and explosives and presents a list of the chemicals commonly encountered in clandestine laboratories. Field Guide to Clandestine Laboratory Identification and Investigation also provides information about chemical hazards, the personal protective equipment required, and proper processing of the lab site for the physical evidence necessary for prosecution.