evidence and csi key points

locards exchange principle

Principal that states across transfer of physical evidence

perception

process of becoming aware

observation

Carefully watching something or someone to gain information

testimonial

A statement given by witness usually at court

Datum point

Coordinate system by mapping a crime scene

primary crime scene

original location of a crime or accident

secondary crime scene

An ultimate location where additional evidence may be found

What is the purpose of evidence?

Data presented to a court or jury proof of the facts and issues which may include testimony of witness

purpose of CSI unit

The CSI unit documents, the crime scene in detail and collects on any print physical evidence

Define an apply examples direct versus indirect

First hand observation that directly links person to crime without influence examples include eyewitness testimony, indirect definition, used to imply a fact, but does not directly prove it example a suspects fingerprint found out a scene, but not committing the crime

Class versus individual evidence

Narrows to a group versus narrows to a single source example blood type versus DNA of fingerprints

trace evidence

Evidence found in a small but measurable amount, example hair, soil or blood

Physical versus chemical versus biological of evidence

Physical, any object or material item, chemical analyze for competition and biological from a living source

Associated versus transfer evidence

Evidence that must connect crime scene victim/suspect versus produced by contrast and deep end upon impressions and native of contact

Conditional versus transient evidence

Produced specific specific event versus temporary or easily lost

Characteristics of being a good observer

Objective uses all senses to get information

Factors that affect eyewitness accounts

Misinformation, others, influence, and cross race , racial theory

Best practices of a crime scene investigator

Separately, interview and witnesses, use open and in questions for less confusion

Steps of a crime scene

One isolate and secure the scene two separate the witnesses three document the scene for search for evidence five collect and package evidence six submit evidence for analysis and seven solve the case

Crime scene personnel, and significance

One police officers first to arrive, responsible for evidence to detectives interview witnesses and consults with CSI unit three District attorneys helped determine search warrant from the judge for medical examiners primarily cause define cause of death and five specialist may be called if needed for analysis 

Components, you need to sketch for crime scenes

One fine north identified by a compass to scale for distance from the daunt .3 objects in the vicinity of the crime should be included for all important items of evidence be shown five numbered and labeled pieces of evidence on final product