Divisions Of Forensic Science And Their Functions PDF

Divisions Of Forensic Science And Their Functions  Introduction. The investigator collects all the available evidence during the process of investigation. Direct evidence is collected from the Victim, witness, informants, suspects & other persons connected dire...

Divisions Of Forensic Science And Their Functions  Introduction. The investigator collects all the available evidence during the process of investigation. Direct evidence is collected from the Victim, witness, informants, suspects & other persons connected directly & indirectly with the crime. The investigating officer collects objective evidence from the scene of crime , victim, suspect & other sources in order to establish linkage on basis of systematic scientific examination.  The scientific persons who examine such evidence are called Forensic scientist. The physical evidence present in all the crimes when properly located, located, lifted evaluated scientifically will have great potential in linking the crime with the criminal. CHEMISTRY DIVISION Facilities for carrying out the chemical analysis of viscera, NDPS (Narcotic Narcotic drugs and Psychotropic substances), ), remnants of accelerants in arson cases,, etc. with help of sophisticate instruments like LCMS, HPLC, HPTLC, GC, UV & IR Spectro- photometers exist in this division. division  Examination of opium / crude opium, morphine / opium alkaloids. Examination of Heroin samples. samples Examination of Cannabis samples. samples Examination of Cocaine samples. samples Examination of Methaqualone samples. Examination of Amphetamine samples.  Examination of Barbiturate derivatives Examination of Benzodiazepine derivatives. Examination of Peyote cactus ( Mescal buttons)/Mescaline. Examination of Psilocybe Mushrooms/Psilocybin. Examination of Lysregide (LSD).  Determination of alcoholic contents (ethylalcohal) in liquor samples. samples Detection of inflammable material and their residues in arson case. Detection of dyes used in trap cases. cases  Identification of various fuels, CHEMICALS Identification of various fuels such as petrol, diesel, kerosene oil. Examination of corrosive chemicals in acid throwing cases. Reconstruction and evaluation of arson sites.  Toxicology & Narcotic unit Identification of volatile inorganic poisons such as Hydrogen Cyanide, Phosphine, Arsine, Yellow phosphorus, Carbonyl chloride, Sulphonyl chloride. chloride  Identification OF VOLATILE ORGANIC POISONS Identification of volatile organic poisons such as Chloroform, Benzene, Formalin, Methanol, Ethanol, Acetaldehyde, Acetone, Phenol, Naphthalene, Nicotine, Toluene,Terpentine oil, Paraffin, Halogenated aliphatic compounds, Chloral hydrate, Mineral oils, Pyridine, Aniline, Ethylene dibromide,, Carbon tetrachloride and Petrol.  IDENTIFICATION OF NON- NON VOLATILE INORGANIC ANIONS Identification of non--volatile inorganic anions such as Nitrate, Perchlorate, Chlorate, Fluoride, Selenide, Selenide Chloride, Dichromate, Bromide, Phosphate, Manganate, Sulphate, Styphnate,, Azide, Chlorite, Nitrite and Arsenate.  Identification of non-volatile non inorganic cations Identification of non-volatile volatile inorganic cations such as , Cd, Hg, Th, Ba, Pb, MN, Bi Cu, Al, Zn, Fe+2 and Fe+3.  Identification of non-volatile volatile organic neutral compounds Identification of non--volatile organic neutral compounds such as Chlorinated pesticides, Organophosphorus insecticides, Carbamates, Synthetic pyrethroids, pyrethroids Fungicides, Herbicides, Plant hormones.  Identification of organic acidic drugs Identification of organic acidic drugs such as Barbiturates, Glutethimide, Glutethimide Hydantoin, Caffeine, Phenacetin, Phenacetin Salicylates.  Identification of basic drugs Identification of basic drugs such as Benzodiazepines, Alkaloids (Synthetic or of plant origin), Tranquilizers and Phenothiazenes.  Identification of miscellaneous poisons Identification of miscellaneous poisons such as Mineral acids, Alkalis, Organic acids, Organic insoluble like Antibiotics, Sulphonamides,, Toxins of poisonous plants, animals and insects.  BALLISTIC DIVISION This division provides facilities for the examination of a variety of firearms and cartridges to ascertain their make, model, working condition, caliber and to establish a possible link to the firearm and crime, explosive cases and re- construction of scene of crime in important cases in order to help the investigating agencies. Image processing and Pattern recognition unit is going to be started in the near future.  Barrel Wash Examination. Examination of Firearm(s) or part(s). thereof/manufacturing tool(s). Examination of serviceability/working condition of firearms. Examination of firearms, prone to accidental discharge.  Identification of firearm for type, make and model. Examination of firearm, whether its part(s) tempered with. Examination of ammunition or parts thereof/manufacturing tools.  Identification of ammunition/parts thereof for type, make and caliber Identification of bullet/slug/parts thereof Identification of shots and pellets Identification of wad/wad pieces Identification of propellant charge  Linkage of fired/misfired cartridge with firearm Linkage of fired bullet/bullet fragments with unrifled firearm Bullet/pellets/wads whether fired or not  Examination of target(s) involved in shooting Chemical tests for ammunition and firearm discharge residue Test firing Test specimen  PHYSICS DIVISION This division provides facilities for the analysis of building materials such as Cement, Sand Mortar,, Plaster, concrete, Bricks, etc. Examination of paint in hit and run cases, road accidents.  PHYSICS DIVISION identification of wires in theft cases, fibers, clothes, ropes, metals and quantization, purity percentage of metals involved in criminal cases is also undertaken with the help of sophisticated instruments like Atomic Absorption Spectrophotometers. Physics Division (A-V) V) is undertaking the examination of cases related to Audio, Video tape authentication and Speaker identification.  Examination of foot/footwear/tyre foot/footwear/ marks Examination of tool marks Examination of paint Examination of identification marks Examination of glass fragments Examination of soil samples, cement samples  Restoration of erased numbers on vehicles/firearm e.g. chassis number, engine number, registration number, identification numbers. Examination of mortar.  Examination of concrete Examination of fiber, fabric Examination of broken objects Examination of electrical cables/wires Examination of electric appliance, electric meter  Examination of spurious product for infringement Examination of papers Examination of voice for speaker identification Examination of analog/digital images Examination of audio and video recording media for authentication  Photo Division Preparation of photograph of Exhibits received in the laboratory Photography of scene of crime Examination of photographs as exhibit  BIOLOGY DIVISION The examination of biological fluids, skeletal remnants, diatoms, hair, seeds, maggots, vegetable fibers, wood etc. are undertaken by this division. Besides, it also helps out the investigating agencies in crime cases involving rapes and murders on the spot.  Further serological examinations such as grouping of blood/semen/saliva and DNA typing in criminal and paternity dispute cases forwarded by Delhi Police as well as from Hon’ble Courts is carried out in this division. Biological Sciences Division The examination of exhibits in the Biological Sciences Division is broadly categorized as under: Examination of blood stains Examination of seminal and vaginal stains Examination of salivary stains Examination of hair  Determination of origin of species Grouping of blood/other body fluids DNA UNIT Extraction,, amplification and fragment analysis of DNA for personal identification and paternity testing DOCUMENTS DIVISION This division undertakes examination of various types of questioned document problems in all forensic aspects such as identification of handwriting, type-writing, writing, printed matter, seal and stamp impressions, etc. It also carries out the detection and decipherment of erasures, alterations, over-writings, writings, addition, obliterations,, determination of sequence of strokes,, age of documents, etc. FORMS OF DOCUMENTS The documents examined are in the form of Bank Draft, Cheques, Cheques Receipt, Will, Affidavit, Bail Bond, Lottery Tickets, Anonymous /ransom letters, Answer Sheets of different examinations, Suicide note, Agreement, Passport, Currency note, Skin tattoo marks, etc. Further faculties for examination of computer crime cases is also carried out in this division.  Handwriting/ / Signatures Identification, Detection of forgery Examination of alteration in documents i.e. addition, substitution,, obliteration, interpolation, overwriting, erasures etc. and their decipherment Examination of typewriting, printed matter, computer printouts,, Xerox copies, identification  Examination of lottery ticket Examination of counterfeit currency Comparison of paper including stamp paper/ stamps & other security/ legal papers  Determination of age of document Examination of stamp impressions and seal comparison Examination of sequence of strokes Examination of credit card, travel documents Examination of indented writings  Examination of charred documents Examination of carbon paper, ribbon, stencil. Examination of ink Examination of tricky/built up documents Examination of partially visible /invisible strokes on documents  COMPUTER FORENSICS UNIT CFU is undertaking Imaging of various storage devices,, Retrieval of Data/Deleted Data from storage devices like Hard Disc, Pen Drive, Memory Card,, CD/DVD etc., Extraction of Data, Deleted Data from Mobile Phones and SIM Cards.  Forensic imaging of various storage media To retrieve data / deleted data from various storage media(Hard Disk, Pen Drive, Memory Card, CD / DVD) and many other storage media. media To extract data from mobile phones and SIM cards.  FORENSIC PSYCHOLOGY DEPARTMENT Forensic Psychology is the interface between psychology and law. It is the application of psychological principles and knowledge to various legal activities involving crimes listed under the Indian Penal Code. Currently the Forensic Psychology Division, Delhi, FSL undertakes polygraph examination,, that is based on the principle of psychosomatic interaction within an individual who is under investigation of various criminal and felony charges like Rape, Murder, Economic Offences, Cyber Crimes etc.  Facilities for verifying the veracity of statements of suspects, complainants and witnesses exist in this division. The division is under expansion stages with other Detection Deception Techniques like Brain Electrical Oscillation Signature (BEOS) also under procurement.