evidence collection in metallic poisoning cases
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Collection AndPreservation of evidenceIn Metallic Poisoning
Cases
Collection AndPreservation of evidenceIn Metallic Poisoning
CasesNiranjana.S.Karandikar
MSc-IRoll No.12
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Toxicology
Science deals with poison with rest to
Source, Properties, Mode of action,
Symptoms, Nature Of Fatal Results,,
Estimation ,and Autopsy Findings.
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POISON
Substance which when administered,inhaled or ingested is capable of acting
deleteriously on the human body.
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Mode OFAction
Corrosives Irritants
OrganicInorganic
Neurotics Cardiac AsphyxiantsMiscellaneo
us
plantanimal Metallic Non Metallic
Mechanical
Cere ra
spinal
peripheral
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Poisoning
Acute: Symptoms develop soon afteradministration
Chronic: Symptoms develop gradually
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Metallic Poisons
Arsenic
Mercury
Lead Copper
Thallium
Zinc
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Evidence Collection
Sources:1. The Scene2. Eye witnesses
3. The victim4. The attending doctor
5. Drug store, chemical stores, herbarium6. The autopsy surgeon
7. The culprit8. Vehicle(if any)
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The Crime Scene
Vomitus
Purged Material
Urine or faceal stains
Clothes, bed sheets, bed covers Medicines (used by family or victim)
All containers Of medicine
Remains of food and Drinks
Containers found lying around or in garbage
Utensils
Substances in traps of the sink
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The Victim
Most Important source of evidence
Dead or Alive
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Dead
Clothes
Stains
Autopsy Material
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Autopsy Material
Blood:from artery or vein or heart orchronic gutter-500 ml
Urine: total amount recover from catheter
or o enin
Stomach contents-whole
Intestine with contents-30 cm
Liver+Gall Bladder with contents-100g
Half of each kidney
Spleen: half in adult, whole in children
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Also helpful
Brain-whole
Lung-One
Heart -whole Muscles-500 g
Bone-500 g
Hair and Nails-10 g
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Non Fatal Cases
Purges and Vomitus
Saliva and other excretory stains
Urine: whole amount Stomach Washings
Blood-500 ml or more
The clothes Residual food, containers, drugs,
medicines
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Preservation
For Viscera: absolute alcohol or rectifiedspirit.
Exception: alcohol, chloroform,chloral
hydrate, formaldehyde, ether, phosphorusa co o preven s e um nos yo
phosphorus in dark) etc.
Blood should be preserved in fluoride,
oxalate, E.D.T.A., gold chloride or citrate Urine and clothes: without any
preservative.
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Chain Of Custody to be made andmaintained.
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References
Sharma, B.R. : Forensic Science in CriminalInvestigaion and Trials, Central Law Agency,Allahabad, 1974.
, ,Science in Crime Investigation, 2011,Selective& Scientific Books, New Delhi.
Parikh C.K; Text Book of MedicalJurisprudence Forensic Medicines andToxicology. CBS Pub. New Delhi (1999)
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