2nd test Flashcards
(33 cards)
what is the first step in processing a crime scene?
securing it
who secures the crime scene
the first officer to arrive at the scene
what does the responding officer need to do to set boundaries
set up crime scene tap or use saw horses as well as clear unauthorized people
who are unauthorized people
press, eyewitnesses, spectators, family, neighbors, victims, and criminals
who are authorized people
police, CSI, EMTs, Paramedics, firefighters, medical examiners, and bomb squad
what is the second step in processing a crime scene
recording the scene
what steps do you do to record a crime scene
photograph, sketch, and take notes
photographing a scene
different angles and close ups of evidence allowing them to see crime scene even when its gone. weather can destroy evidence and everything
sketching a scene
rough diagram of the scene which focuses on important stuff such as a bullet hole, gives you location and distance in reference to other things
Notes in a scene
handwritten or voice recorded details of the scene, any objects, victims or interviews
why is it important to have sketches and notes to go along with the crime scene photos
notes can describe the smells, sounds, temperature and anything through the senses. Pictures do not. sketching can focus on important part of scene where i a picture someone might look at something not important
why do you need to do a “systematic” search of the crime scene?
this assures that all evidence is found and all areas are searched
what are the common search methods
spiral, grid, line, and zone
spiral search method
best for open spaces, best when solo or in a team
grid search method
most common, set when working alone and if there is lots of evidence, best if there lots of clutter so you are thorough
line search method
most often done with a partner, best when their is narrow spaces or a location that is naturally straight
zone search method
best for when there is an area with multiple spaces, houses, stores, and vehicles, always done in teams
what are things to keep in mind when collection evidence
- its priority - wether or not you need to collect it first before it gets tampered
- its relevance and importance to the case
- select the correct packaging
why is it necessary to package each piece of evidence separately?
to avoid cross examination
what is the chain of custody?
a list of persons who came into possession of an item of evidence
why is the chain of custody so important (2 things)
it upholds the integrity of the evidence and protects authenticity
what does the chain of custody contain
description, date, location, time, initials, and tests performed
when does the chain of custody start
begins at the crime scene and ends when the case is closed
what are standard reference samples
samples taken from an area in close proximity to evidence, we compare to evidence and eliminate and “normal” substances
