sical evidence will be used in solving or prosecuting the violent crime. Crime scene investigation is not what we think it is, unlike the movies, is actually a difficult and time consuming job. There is no substitute for a careful and thoughtful approach. One should not leap into conclusions as to what happened based on what little information he has with him or her, but generate several theories of the crime, keeping the ones that have not been crossed out by incoming information at the scene. Reasonable inferences about what happened are produced from the scene and appearance and information from witnesses. These theories will help guide the investigator to document specific conditions and recognize valuable evidence. Documenting crime scene conditions can include immediately recording transient detail such as lighting (on/off), drapes (open/closed), weather, or furniture moved by medical teams. Certain evidences such as shoe prints or gunshot residue is fragile and if not collected immediately can be destroyed or lost. The scope of the investigation also extends to considerations of arguments which might be generated in this case (self defense / suicide) and documenting conditions which would support or refute these arguments. In addition, it is important to be able to recognize what should be present at a scene and what should not (victim's vehicle/wallet) such as objects which appear out of place (ski mask) which might have been left by the assailant. It is also important to determine the full extent of a crime scene. A crime scene is not merely the immediate area where the body is located or where an assailant concentrated his activities but can also encompass a vehicle and access/escape routes. Although there are common items which are frequently collected as (evidence fingerprints, shoe prints or bloodstains), literally any object can be used as physical evidence. Anything which can be used to connect the victim to a suspect or a suspect to a victim or crime scene is relevant physical evidence. Using the shopping list approach (collecting all blood stains, hairs, or shoe prints in recognizing the best evidence. For example, collecting bloodstains under the victim's body can be excellent physical since it can be directly tied to a matchbook found in a suspect's pocket. Since a weapon or burglar tool is easily recognized as significant physical, it is frequently destroyed by the perpetrator. Sometimes the only remaining evidence is microscopic evidence consisting of hair fibers, or other small traces the assailant unknowingly leaves behind or takes with him. Although this evidence is effectively collected when the clothing of the suspect or victim is taken, protocols (involving tape lifts) should be in place to process nude bodies so as to not lose this fragile evidence. Forensic chemistry is the application of chemistry to the investigation of a crime. The investigation of the crime is, however, is not limited to crime against individuals such as home suicidal, theft, fraud and arson. Forensic chemists also involved in the investigations of crime against society such as food adulteration, environmental pollution, use and pollution of unsafe chemicals and dangerous working conditions. The application of chemistry to the study of physical or theoretical problems, the results of which may be entered into court as technical evidence. Boundaries are not sharply defined for forensic chemistry, and it includes topics that are not entirely chemical by nature. Some of the items most often encountered in crime laboratories, and the information sought in regard of them , are: (1) Body fluids and viscera to be analyzed for poisons, drugs or alcohol, quantization of which may assist in determining the dosage taken or the person's behavior prior to death; (2) Licit and licit pills, vegetable matter, and pipe residues for the presence of controlled substances; (3) Blood, saliva, and seminal stains, usually in dried form, to be checked

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