Stippling (Tattooing)
Definition
Discrete punctate abrasions or haemorrhages around an entry wound from individual unburned propellant granules embedding in the epidermis at intermediate range. Unlike soot, cannot be washed off. Pattern size and density allow range estimation when calibrated against test-fired reference samples.
- What it is
- Discrete punctate abrasions or hemorrhages in skin from propellant particles during close-range fire
- Key feature
- Cannot be washed off, unlike soot, because particles embed in the epidermis
- Forensic use
- Range estimation via pattern density and distribution, calibrated against test-fired samples
Common questions
What causes stippling around a gunshot wound?+
Stippling is caused by unburned or partially burned propellant particles ejected from the muzzle at close range. These particles embed themselves in the epidermis, creating tiny punctate abrasions or hemorrhages around the entry wound.
How is stippling different from gunshot residue soot?+
Unlike soot, stippling cannot be washed off because the particles physically embed in the skin rather than settling on the surface. This makes stippling a permanent and reliable marker for range estimation in medico-legal examination.
How do forensic pathologists use stippling to determine firing distance?+
The pattern, size, and density of stippling are compared against test-fired reference samples from the recovered firearm. This calibration allows investigators to estimate the approximate range at which the shot was fired.
Related terms
- Abrasion Collar
- The rim of abraded, dried skin surrounding a gunshot entry wound, produced by the bullet stretching the skin inward before perforation. Width...
- Azo Dye
- A class of organic dyes containing one or more azo groups (R-N=N-R'). Formed in the Griess test by coupling of a diazonium...
- Blow-Out Exit Wound
- A large, ragged exit wound with radiating lacerations produced when the bullet retains high residual kinetic energy at exit and the skin...
- BSA 2023 (Bharatiya Sakshya Adhiniyam)
- India's evidence statute enacted in 2023, replacing the Indian Evidence Act 1872. Sections 39-46 govern expert testimony, including the admissibility and presentation...
- Contact Stellate Wound
- Entry wound morphology at hard-contact muzzle-to-skin distance over bone: central perforation with radiating linear lacerations caused by discharge gas expanding laterally beneath...
- Contact Wound
- A firearm wound produced when the muzzle is pressed against or within a few centimetres of the target surface. Characterised by a...
- DeHaan Modification
- A refinement of the Griess test procedure for forensic propellant residue detection, using a combined sulphanilic acid + NEDA reagent on filter...
- Grease Ring
- A grey-to-black discolouration at the outer margin of the entry wound's abrasion collar, caused by lubricant and metal fouling on the bullet...
- Modified Griess Test
- A contact-transfer colour chemistry test for nitrite-containing propellant combustion residue. Sulphanilic acid undergoes diazotisation with nitrous acid (from NO2 on the target...
- Muzzle Imprint
- A patterned contusion or abrasion left on skin by the muzzle face of the weapon in hard-contact wounds. In revolvers, the cylinder-face...
- NEDA (N-(1-Naphthyl)ethylenediamine Dihydrochloride)
- The azo coupling component in the modified Griess test. After diazotisation of sulphanilic acid with nitrous acid, NEDA couples with the diazonium...
- NIJ Range Estimation Guidelines
- NIJ Standard 0612.00 (US National Institute of Justice). The primary US guidance document for firing-distance determination methodology, covering test-fire protocols, pattern comparison...
Explained in these topics
- Firing Distance Chemistry: Griess Test and Sodium RhodizonateDiscrete punctate abrasions or lacerations in skin caused by unburned or partially burned propellant particles driven outward from the muzzle during close-rang...
- Firearm Entry and Exit Wounds: The Medico-Legal ReadingDiscrete punctate abrasions or haemorrhages around an entry wound from individual unburned propellant granules embedding in the epidermis at intermediate range...