Forensics Unit 1C

Direct Evidence

Evidence that supports an alleged fact of case

Direct Evidence Examples:

Eye witness or video recordings

Indirect/Circumstantial Evidence

Physical Evidence or biological evidence that would Link someone or something

Indirect/Circumstantial Evidence Examples

Fingerprints, blood, hair

Class Evidence

Narrows down to a group of people or things

Class Evidence Examples

Blood Type

Individual Evidence

Identifies 1 specific person or thing

Individual Evidence Examples

Fingerprints or handwriting

Biological Evidence

Bodily fluids or tissues that can be tested for DNA

Biological Evidence Examples

Blood, hair, pollen, salive, semen, skin samples

*Also physical evidence

Physical Evidence

Evidence that can connect someone to a crime scene

Physical Evidence Examples

Blood, hair, impressions, biological materials, fingerprints, glass, paint chips

*Not all evidence is physical or biological evidence

Trace Evidence

Small pieces of evidence that links us to a person or thing

Trace Evidence Example

Hair

Locard’s Principle

When two things come into contact there is a cross transfer of physical material/evidence. Study of material can determine the nature and duration of the transfer.