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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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