Tag Archives: collection and preservation of evidence

Evidence and Possible Location To Find DNA On Evidence.

by @forensicfield

Introduction:

🔎Biological evidence is a type of Physical Evidence which contains DNA. Biological evidence are very useful to connect offender to a crime scene. Sometimes these evidence can be hard to find by naked eyes. DNA can be found on many things or objects.

Where to find Biological evidences on objects are given further::

Baseball / Cricket Bat

Location – Handle

Source of DNA
• Skin Cells
• Sweat
• Blood
• Tissue

Hat/Bandana

Location – Inside Surface

Source of DNA
• Skin Cells
• Sweat
• Saliva
• Hair
• Dandruff

Mask

Location – Inside Surface

Source of DNA
• Skin Cells
• Sweat
• Saliva
• Hair

Spectacles

Location
• Nose
• Ear piece
• Lens

Source of DNA
• Skin Cells
• Sweat

Facial Tissue/Cotton Swab

Location – Surface

Source of DNA
• Mucus
• Sweat
• Blood
• Semen
• Ear Wax

Dirty Clothes

Location – Surface

Source of DNA
• Saliva
• Sweat
• Blood
• Semen

Toothpick

Location – Surface

Source of DNA
• Saliva
• Blood

Cigarette (Used)

Location – Cigarette Butt (Filter Area)

Source of DNA
Saliva

Used Stamp/Envelope seal

Location – Moistened Area

Source of DNA
Saliva

Tape/Ligature

Location – Inside/Outside Surface

Source of DNA
• Skin Cells
• Sweat
• Saliva

Bottle/Can/Glass

Location
• Mouthpiece
• Outer Surface
• Rim

Source of DNA
• Skin Cells
• Sweat
• Saliva

Bed Sheets

Location – Surface

Source of DNA
• Sweat
• Saliva
• Hair
• Blood
• Semen

Used Condom

Location – Inside/Outside Surface

Source of DNA
• Semen
• Vaginal / Rectal cells

Fired Bullet

Location – Outside Surface

Source of DNA
• Blood
• Tissue

Bite Marks

Location – Surface Of Skin

Source of DNA
Saliva

Fingernails

Location – Scrapings

Source of DNA
• Skin Cells
• Sweat
• Blood
• Tissue

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