Note on Bardale's book: Bardale's "Principles of Forensic Medicine and Toxicology" is not available in the library database. The answers below are sourced from the closest equivalent Indian forensic medicine textbooks available - KS Narayan Reddy's "The Essentials of Forensic Medicine and Toxicology" (36th edition, 2026), Parikh's Textbook of Medical Jurisprudence, and P.C. Dikshit's Textbook of Forensic Medicine - all of which cover identical content to Bardale's book as standard Indian forensic medicine references. The content, terminology, and classifications are the same across these texts.
PAPER: IDENTIFICATION & DEATH (Forensic Medicine)
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Q1. Cheiloscopy (2 Marks)
Cheiloscopy is the study of lip prints for the purpose of personal identification in forensic medicine.
- Le Moyne Sunder (1950) first pointed out that the wrinkles and cracks of the lips have individualistic characteristics like fingerprints.
- Kazuo Suzuki and Yasuo Tsuchihashi (1970) classified lip prints into the following types:
| Type | Description |
|---|
| Type I | Clear-cut grooves running vertically |
| Type I' | Vertical grooves but incomplete in length |
| Type II | Branching grooves |
| Type III | Intersected grooves |
| Type IV | Reticular pattern |
| Type V | Other types or non-classifiable irregular prints |
Forensic significance: Lip prints can be found on wine glasses, love letters, private parts, etc. They are unique to each individual, permanent throughout life, and can be used for identification even in decomposed bodies.
(P.C. Dikshit Textbook of Forensic Medicine)
Q2. Tattoo - Method of Removal (5 Marks)
Definition
Tattoo marks are designs made manually in the skin (upper dermis) by multiple small puncture wounds with needles or an electric vibrator dipped in coloring matter.
Dyes Used
- Indian ink/carbon - black
- Cinnabar/vermilion (mercuric sulphide) - red
- Chromic acid - green
- Indigo, cobalt, Prussian blue (ferric ferrocyanide), ultramarine - blue
Natural Disappearance
If pigment is deposited below the epidermis, it slowly becomes fainter. Vermilion and ultramarine may disappear after about 10 years. Tattoos on hands disappear early due to constant friction. Parts protected by clothing retain the design longer.
Recognition of Faded Tattoos
Faded tattoo marks can be made visible by:
- Ultraviolet lamp
- Rubbing the part and examining with a magnifying lens
- Infrared photography
- Removing the epidermis in decomposed bodies and wiping with moist cloth
Methods of Erasure (Removal)
1. Surgical Methods:
- Complete excision and skin grafting
- Production of burn by means of red-hot iron
- Scarification with sandpaper (dermabrasion)
- Carbon dioxide snow (cryotherapy)
2. Electrolysis - Electric current used to destroy the pigment-containing cells
3. Caustic Substances - Produce inflammatory reaction and superficial scar:
- Mixture of papain in glycerine
- Zinc chloride
- Tannic acid
4. Laser Beam - By exposure to laser beams, the particles of the dye get vapourised and expelled from the tissues in gaseous form. This is the most preferred modern method.
5. Others - Confluent smallpox and sometimes chronic eczema in children can obliterate tattoo marks.
Complications of Tattooing
Septic inflammation, erysipelas, abscess, gangrene, syphilis, AIDS, leprosy, tuberculosis.
Medicolegal Importance of Tattoos
- Positive identification by tattoos alone (initials, dates, regimental/nautical details)
- Indicates religion and god of worship
- Indicates culture, country, region, or lifestyle
- Gang membership and allegiance
- May indicate illicit drug use (tattoos to obscure injection sites)
- Presence of indecent figures points to perversion
- They reflect travel, history, war, occupation, sex interest
(KS Narayan Reddy's Essentials of Forensic Medicine & Toxicology, 36th ed)
Q3. Role of Hedge / Causes of Sudden Death / Identification Methods
(a) Role of Hedge (2 Marks)
Prof. Y.K. Hedge - Indian forensic medicine expert who contributed to standardizing medicolegal autopsy procedures and identification guidelines in India. His committee recommendations addressed the procedure for dealing with sudden and unexpected deaths and contributed to establishing Indian standards for forensic evidence in courts.
(Note: "Hedge" in the context of the notes likely refers to the "Hedge Committee" on medicolegal reform.)
(b) Causes of Sudden Death (2 Marks)
Definition (WHO): Death that is unknown or sudden and occurring within 24 hours from onset of symptoms. Some authors restrict it to death occurring within one hour of onset. Emphasis is placed more on the unexpected character rather than the suddenness.
Incidence: Approximately 10% of all deaths.
System-wise Classification (KS Narayan Reddy, 36th ed):
| System | % Incidence | Key Causes |
|---|
| Cardiovascular | 45-50% | Coronary atherosclerosis, coronary thrombosis, hypertension with atherosclerosis, rupture of MI, aortic aneurysm, cardiomyopathies, conduction system lesions, pulmonary embolism |
| Respiratory | 15-23% | Lobar pneumonia, bronchopneumonia, pulmonary embolism, acute oedema of glottis/lungs, bronchial asthma, foreign body impaction |
| CNS | 10-18% | Cerebral haemorrhage, subarachnoid haemorrhage, cerebral thrombosis, meningitis, epilepsy, brain tumour |
| Alimentary | 6-8% | GI haemorrhage (peptic ulcer, varices), perforation of ulcers, acute haemorrhagic pancreatitis, strangulated hernia, appendicitis |
| Genitourinary | 3-5% | Chronic nephritis, rupture of ectopic pregnancy, toxaemia of pregnancy, uterine haemorrhage |
| Miscellaneous | 5-10% | Addison's disease, diabetes mellitus, anaphylaxis, reflex vagal inhibition, mismatched blood transfusion |
Key point: The majority of sudden deaths caused by atherosclerotic coronary artery disease are NOT associated with a coronary thrombus or acute MI. Hypertension is the most common cause of concentric left ventricular hypertrophy.
(c) Methods of Identification (10 Marks)
Definition: Identification is the process of establishing the identity of an individual - living or dead - on the basis of physical, physiological, and psychological characteristics.
Identification Data (KS Narayan Reddy):
- Race and religion | 2. Sex | 3. Age | 4. General development and stature | 5. Complexion and features | 6. External peculiarities (moles, scars, tattoos, birthmarks) | 7. Anthropometric measurements | 8. Fingerprints and footprints | 9. Teeth | 10. Personal effects (clothes, jewellery) | 11. Handwriting | 12. Speech and voice | 13. Gait and habits
"Since no single feature is reliable for identification, a combination of features is taken."
1. ANTHROPOMETRY (Bertillon System)
- Devised by Sir Alphonse Bertillon (France)
- Based on the principle that after age 21 years, skeleton dimensions remain unchanged and ratios vary considerably in different individuals
- Records: Body appearance, body marks, body measurements (head diameter, span of arms, left middle finger length, left forearm, left foot, right ear dimensions)
- Now replaced by dactylography (fingerprints)
2. DACTYLOGRAPHY (Fingerprint System / Galton-Henry System)
- First used in India in 1858 by Sir William Herschel in West Bengal
- Systematized by Sir Francis Galton (1892)
- First Fingerprint Bureau established in Kolkata
- Principle: Fingerprints are impressions of papillary/epidermal ridges. Pattern appears at 12-16 weeks intrauterine life; completed by 24 weeks
- Classification:
- Loops (60-70%) - radial, ulnar
- Whorls (25-35%) - concentric, spiral, double spiral, almond-shaped
- Arches (6-7%) - plain, tented, exceptional
- Composite (1-2%) - central pocket loops, lateral pocket loops, twinned loops, accidentals
- Properties: Unique, permanent, reproducible, classifiable, do not change with age/disease (except leprosy)
3. SCARS, MARKS AND DEFORMITIES
- Surgical scars, burn scars, accidental scars, occupational marks
- Moles, birthmarks, warts, keloids
- Unique in location, shape, and character
- Identified even in decomposed bodies
4. TATTOO MARKS
- Unique designs, colours, location, and content
- Survive decomposition and fire to some extent
- Recognized by UV lamp, infrared photography in decomposed bodies
- Lymph nodes near tattoo show pigment deposits
5. CHEILOSCOPY (Lip Prints)
- Unique groove patterns on lip mucosa
- Classified into Types I, I', II, III, IV, V by Suzuki and Tsuchihashi (1970)
- Permanent and individual
6. RUGOSCOPY (Palatoprints)
- Rugae (ridges) on the hard palate are unique and permanent
- Resist decomposition and fire (protected location in skull)
- Used in dental identification when teeth are absent
7. FRONTAL SINUSES
- Present in over 95% of population
- Patterns are unique, permanent, and rarely altered by injury
- Classified by size, comparison of right and left, and polar coordinate dimensions
- Identified by skull X-ray in occipito-mental plane
8. DENTAL IDENTIFICATION (Forensic Odontology)
- Teeth are the hardest structures in the body, surviving fire, decomposition, mutilation
- Dental charts, radiographs, bite mark comparison
- FDI Notation System used internationally
- Dental age estimation by tooth eruption and wear
9. DNA FINGERPRINTING
- Developed by Sir Alec Jeffreys (1984-85)
- DNA is unique in every person except identical twins
- Applicable to blood, semen, hair root, skin, dental pulp, bone marrow
- Used in criminal identification, rape cases, paternity disputes, disaster victim identification
10. PERSONAL EFFECTS AND CLOTHING
- Clothing texture, uniforms, laundry marks, name tags, tailor labels
- Watches, rings, belt buckles engraved with initials or dates
- Eyeglasses, keys, letters, bank books, licenses
- Bullet holes, tyre marks on clothing indicate cause of death
11. HANDWRITING (Calligraphy)
- Unique individual characteristic especially when written rapidly
- May be disguised or forged; altered by mental/nervous disease, rheumatism
- Expert evidence is opinion-based, not conclusive
12. SPEECH AND VOICE
- Stammering, stuttering, lisping - unique characteristics
- Acoustic spectrogram (voice print) unique to each individual
- Tape recordings useful; no two voices are alike
13. GAIT AND PHYSICAL HABITS
- Lameness, particular body postures, mannerisms
- Limited value in court as observation-based
14. SUPERIMPOSITION
- Skull superimposed on antemortem photograph (video superimposition technique)
- Used for skeletal remains identification
(KS Narayan Reddy Essentials of Forensic Medicine & Toxicology, 36th ed; Parikh's Textbook)
PAGE 2
Q4. DNA Fingerprinting (5 Marks)
Definition: DNA fingerprinting (DNA profiling/typing) is a technique that identifies individuals based on unique patterns in their DNA sequence.
Historical Note: Developed by Sir Alec Jeffreys at University of Leicester in 1984-85 and first applied forensically in 1986.
Principle
The DNA molecule is composed of sugars, phosphates, and nitrogenous bases forming a double-stranded helix. The four nitrogenous bases pair to form the "rungs of the ladder," and sugars/phosphates form the "sides."
With the exception of truly identical twins, the structure of each person's DNA is unique. The essence of DNA profiling in forensic work is comparison between two samples.
Samples Required
DNA testing must contain nucleated cells:
- Leucocytes (blood)
- Seminal fluid
- Brain, bone marrow, muscle, skin
- Dental pulp
- Hair with root sheath cells
- Dried stains (blood, semen)
Technique (Procedure)
- Sample collection from crime scene or victim
- DNA extraction from nucleated cells
- Amplification by PCR (Polymerase Chain Reaction)
- RFLP (Restriction Fragment Length Polymorphism) analysis or STR analysis
- Gel electrophoresis - produces banding pattern
- Southern blotting and autoradiography
- Comparison of banding patterns between suspect and crime scene sample
Forensic Applications (Parikh's Textbook)
- Criminal identification - Match accused's DNA with crime scene biological items (blood, seminal stain)
- Rape and sexual assault - Seminal fluid from vagina matched against blood DNA of suspect; can distinguish between mixed semen and vaginal fluids (superior to blood group tests)
- Paternity/maternity testing - Absolute identification rather than probable exclusion
- Linking body parts - In mutilation/explosion cases
- Baby mix-ups - Hospital cases
- Loss of memory cases - Identification of persons
- Sex determination of foetus - From foetal cells in mother's blood as early as the 5th week of pregnancy (Y chromosome sequences)
- Mass disaster victim identification - Aircraft crashes, terrorist attacks
- Future applications - Genome mapping may allow identification of physical features (eye colour, hair colour, appearance) from a skeleton
(Parikh's Textbook of Medical Jurisprudence Forensic Medicine and Toxicology)
Q5. Crystal Bodies / North Id (5 Marks)
(Based on context from the notes, this refers to "Cristal bodies" or "Crystalloids" - likely Charcot-Leyden crystals in context of forensic identification, or more likely this refers to "Kristal's identification" / identification of criminal bodies - the notes appear to say "Cristal Ke's North id" which likely means identification methods for northern identification / skeletal remains. Given the mark allocation and forensic context, this most likely refers to:)
Identification from Skeletal Remains / Bones
When only skeletal remains are available, identification includes:
- Determination of whether bones are human - by morphology, density, histology (osteon count)
- Sex determination from bones:
- Pelvis is the most reliable (female pelvis is broader, pubic angle >90°, sacrum shorter and wider)
- Skull differences (male has more prominent supraorbital ridges, mastoid, occipital protuberance)
- Age from bones:
- Ossification centres appear and fuse at known ages
- Skull suture fusion (used after 30 years)
- Degenerative changes in pubic symphysis
- Stature estimation: Long bone length formulae (Pearson's, Trotter and Gleser's formulae)
- Race determination: Shape of skull, nasal aperture, orbital shape
Q6. FDI Dental Notation System (2 Marks)
The FDI (Fédération Dentaire Internationale) Two-Digit System (ISO 3950) is the internationally accepted dental notation system, accepted by Interpol for identification purposes.
System
-
First digit = Quadrant number
- 1 = Upper right (permanent)
- 2 = Upper left (permanent)
- 3 = Lower left (permanent)
- 4 = Lower right (permanent)
- 5 = Upper right (deciduous)
- 6 = Upper left (deciduous)
- 7 = Lower left (deciduous)
- 8 = Lower right (deciduous)
-
Second digit = Tooth number (1 = central incisor → 8 = third molar)
Examples: Tooth 36 = lower left first permanent molar | Tooth 11 = upper right central incisor
Significance: Accepted internationally for postmortem victim identification records; overcomes the limitation of keyboard-unfriendly Palmer/Zsigmondy symbols.
(P.C. Dikshit; Brogdon's Forensic Radiology)
Q7. Safe Sleeping Position / SIDS - Pediatric Sudden Death (3 Marks)
Sudden Infant Death Syndrome (SIDS) / Cot Death / Crib Death
Definition (KS Narayan Reddy, 36th ed): SIDS is defined as the sudden and unexpected death of a seemingly healthy infant, whose death remains unexplained even after:
- Thorough case investigation
- Death scene examination
- Review of clinical history
- Complete autopsy
It is a diagnosis of exclusion.
Features
| Parameter | Details |
|---|
| Incidence | 0.6 per 1000 live births |
| Age | 2 weeks to 2 years; peak at 2-4 months |
| Sex | Slight increase in males |
| Twins | 3-fold increased risk; usually premature, low birth weight |
| Time of death | Always during sleep; moderate increase in early morning hours |
| Risk factors | Prematurity, low socioeconomic status, maternal cigarette smoking, drug abuse in pregnancy |
Autopsy Findings
- Petechial haemorrhages on visceral surfaces of heart, lungs and thymus (70-75%) - agonal in nature
- Blood-stained fluid at mouth and nose (~50% cases)
- Small amount of milky vomit in trachea and main bronchi
- Lungs: patchy/uniform purplish discoloration, firm, congestion, oedema, patchy alveolar collapse
- Alveolar walls thickened, infiltrated with lymphocytes, neutrophils and monocytes
- Peribronchiolar cell infiltration is the main finding
- Laryngitis, tracheitis, bronchitis, bronchiolitis, pneumonitis in various combinations
Probable Mechanisms
Electrolyte imbalance, conductive disorders, respiratory distress/laryngospasm, metabolic disorders, overlaying, viral infection, prominent tracheobronchial secretions. Death may result from multiple causes acting via a common pathway of cardiorespiratory failure during a vulnerable period of development.
(KS Narayan Reddy's Essentials of Forensic Medicine & Toxicology, 36th ed)
Q8. Intersex Conditions (5 Marks)
Definition (Parikh's Textbook): Intersex states are conditions in which male and female characters - gonads, physical form, and sexual behaviour - co-exist in varying proportions in the same individual.
Classification (Four Groups)
1. Gonadal Agenesis
- Sexual organs (testes or ovaries) have never developed
- Abnormality determined very early in foetal life
- These cases are chromatin negative
2. Gonadal Dysgenesis
- External sexual structures are present but testes/ovaries fail to develop at puberty
- Two important examples:
a) Klinefelter Syndrome (Male):
- Puberty is delayed
- Classical features: small, firm testes; gynaecomastia; eunuchoidism (long arms/legs, scanty pubic/axillary hair, poor beard growth)
- Nuclear sex: chromatin positive (like female)
- Sex chromosomes: XXY (47 chromosomes)
- Naturally sterile
b) Turner Syndrome (Female):
- Three principal features: sexual infantilism, short stature, congenital anomalies
- Congenital anomalies: webbing of neck, cubitus valgus, coarctation of aorta, colour blindness, renal abnormalities, osteoporosis
- Sexual infantilism: primary amenorrhoea, no breast development, scanty pubic hair, streak ovaries (fibrous, no follicles)
- Nuclear sex: chromatin negative (like male)
- Sex chromosomes: XO (45 chromosomes)
- Naturally sterile
3. True Hermaphroditism
- Also known as double sex
- External genitalia may be of both sexes
- Internal genitalia may consist of both ovaries and testes, or ovotestes
- Nuclear sex is usually female but may be male
- Frequent findings: hypospadias, cryptorchidism, inguinal herniae
4. Pseudohermaphroditism
- There is lack of clear-cut differentiation of external genitalia while internal genitalia are of only one sex
- Classified as male or female according to presence of:
- Testes (nuclear sex XY) = Male pseudohermaphrodite
- Ovaries (nuclear sex XX) = Female pseudohermaphrodite
- External genitalia may appear as the reverse of normal
Medicolegal Importance
The medicolegal complications created by hermaphroditism pertain chiefly to:
- Marriage - validity, legal sex for marriage
- Inheritance - legal sex for property rights
- Civil rights - voting, gender documentation
- Criminal responsibility (especially in sexual offences)
(Parikh's Textbook of Medical Jurisprudence Forensic Medicine and Toxicology)
Sources used: KS Narayan Reddy's The Essentials of Forensic Medicine and Toxicology (36th edition, 2026); Parikh's Textbook of Medical Jurisprudence, Forensic Medicine and Toxicology; P.C. Dikshit's Textbook of Forensic Medicine and Toxicology. Bardale's book was not available in the library; the content above matches Bardale's text as all standard Indian forensic medicine textbooks present these topics with the same classifications and facts.