COMMON TYPES OF PHYSICAL EVIDENCE

DRUGS

• Class because there are multiple different kind of drugs
• and you can't be sure that all the white ones are the same as the others.

BLOODSPATTER

• Class because there are multiple groups of different blood types

FIBERS

• Class because fibers can't be tied down to just one person or thing.
• Also there are multiple synthetic and natural fiber.

FINGERPRINTS

• Individual because fingerprint are unique.
• No two people have the same prints.

FIREARMS

• Class because you can be sure that that gun was used at the crime scene.

GLASS

• Individual because if the glass is big enough you can see if
• It connect with the other glass.

HAIR

• Class because on can not specifically idenfiy a person by their hair.

IMPRESSIONS

• Individual because if the marks show sign of being worn
• out you can match them with the object used for the impression.

ORGANS

• Individual because everyone has their own organs from their own bodies.

EXPLOSIVES

• Class because there are many similar explosives like from TNT
• and they explode the same way.

PAINT

• Individual because the pain chips can match up to each other
• and if there are 9 or more layers of paint.

PETROLEUM OIL

• Class because its all the same and hard to tell.
• Also the oil is manufactured.

PLASTIC BAGS

• Class because plastic bags are found and used everywhere.
• Also they are manufactured.

POWDER RESIDUE

• Class because they may not be able to tell if its fully powder,
• or what gun it came from.

SERIAL NUMBER

• Individual because serial numbers are never the same.

DOCUMENTS

• Individual because you signature and handwriting are on it.

SOIL AND MINERALS

• Class because you don't exactly no if the soil comes
• from a place near you or from somewhere else.

TOOL MARKS

• Individual because the mark matches the tools.