Chain of Custody
the documented and unbroken transfer of evidence
Biological Evidence
Blood or Hair
Trace Evidence
small but measurable amounts of physical or biological material found at a crime scene
Principle of Exchange
when a person comes into contact with an object or another person, a cross-transfer of physical evidence can occur. Study of the material can determine the nature and duration of the transfer
Search Patterns
grid, linear, quadrant, spiral
Individual Evidence
a kind of evidence that identifies a particular person or thing
Crime Scene Investigator
Investigate crimes by carefully collecting and analyzing physical evidence
class evidence
material that connects an individual or thing to a certain group
Dr. Locard
Established the Principle of Exchange
eyewtiness
a person who has directly seen something happen and can give a first-hand description of it
Direct Evidence
evidence that (if true) proves an alleged fact, such as an eyewitness account of a crime
First Responder
the first police officer to arrive at a crime scene
Bindle
a folded paper used to hold trace evidence
The Seven S's of Crime Scene Investigation
secure the scene , separate the witness, scan the scene, seeing the scene, sketch the scene, search for evidence, secure the collected evidence
Several examples of crime scene search patterns
Grid, Linear, Quadrant, Spiral