investigation team
what role do police officers play in team
are usually the first to arrive at a crime scene. A district attorney may be present to determine whether a search warrant is necessary for the crime-scene investigators.
what is step one
SECURING THE SCENE
This means the officer protects the area within which the crime has occurred, restricting all unauthorized persons from entering
what is step six
SEARCHING FOR EVIDENCE
Common search patterns are spiral, grid, linear, or quadrant pattern. (These will be explained on the next slide.) The entire area should be walked and the location of all evidence should be individually marked, photographed, and sketched.
what is circumstantial evidence
evidence used to imply a fact but not prove it directly
what is Locards exchange principle
Locard’s exchange Principle states that when a person comes into contact with an object or another person, a cross-transfer of physical evidence can occur
what role do crime scene investigators play in team
document the crime scene in detail and collect physical evidence. Crime-scene investigators include recorders to record the data, sketch artists to sketch the scene, photographers to take photos of the crime scene, and evidence collectors.
what is step two
SEPARATING THE WITNESSES
Witnesses must not be allowed to talk to each other. This separation is done to avoid witnesses working together to create a story (collusion).
what is step seven
Record and Collect Physical Evidence
All evidence must be properly marked and packaged and a Chain of Evidence is begun. This step requires proper containers and labels for each individual piece of evidence.
what is class evidence
material that connects an individual or thing to a certain group
what is chain of custody
In order to introduce physical evidence into trial, prosecutors must prove an unbroken chain of custody of that evidence.
what role do medical examiners/coroners play in team
necessary to determine the cause of a death when a homicide has occurred.
what is step three
SCANNING THE SCENE
The forensic examiners need to scan the scene to determine where photos should be taken. A determination may be made of a primary crime scene and secondary crime scene and priorities assigned regarding examination
what is step eight
Conduct a Final Survey
Be certain that every package containing physical evidence is collected - leave nothing behind. Make a final walk-through to be certain that all potential evidence is bagged and tagged.
what is direct evidence
evidence that if true proves an alleged fact, such as an eyewitness account of a crime.
what is sufficiency of evidence
the sufficiency of evidence test is a standard for reviewing a criminal conviction on appeal based on existing evidence.
what role do detectives play in team
look for leads by interviewing witnesses and talking to the crime-scene investigators about the evidence.
what is step four
SEEING THE SCENE (Photographing)
Photos of the overall area and close-up photos with and without a measuring ruler should be taken. Some experts video the crime scene.
what is individual evidence
a kind of evidence that identifies a particular person or thing
what is an admission
a statement that tends toward proving guilt. A suspect does not accept responsibility for committing a crime in an admission.
what role do specialists play in team and what are they
such as entomologists (insect biologists), forensic scientists, and forensic psychologists may be consulted if the evidence requires their expertise.
what is step five
SKETCHING THE SCENE
An accurate rough sketch of the crime scene is made,
noting the position of the body (if any) and any other evidence.
what is trace evidence
Small but measurable amounts of physical or biological material found at a crime scene.
what is a confession
a fully corroborated statement during which the suspect accepts personal responsibility for committing a crime.