Chemistry for the Analysis of Trace Evidence - Lecture 2

A collection of vocabulary flashcards based on key concepts from the Chemistry for the Analysis of Trace Evidence lecture.

Locard’s Exchange Principle

The principle that states the perpetrator of a crime will bring something into the crime scene and leave with something from it, thus providing evidence of their presence.

Probative weight

The ability of evidence to prove something relevant in a case; determined by the uniqueness of the trace.

Transfer

Process by which trace evidence is moved from one location or surface to another.

Persistence

The duration that trace evidence remains detectable after it has been transferred.

Non-contact transfer

Transferring trace evidence without direct physical contact

Sydney Declaration

Document that outlines the fundamental principles of forensic science and emphasises the contextual nature of trace evidence.

Evidence of association

Indicates a connection between a suspect and a crime scene through trace evidence.

Contamination

The introduction of unwanted material that can affect the analysis of trace evidence.

Activity Level

How the conditions of an activity influence the transfer and persistence of trace evidence.

Environmental factors

Elements such as weathering or microorganisms that can influence the degradation of trace evidence over time.