Crime Scene Quiz Flashcards
Sketches can also give a permanent record of
The relationship of different points of interest to each other in the scene
Sketches do what better than a photograph?
Sketches may give a better overall layout of the scene than do photographs
What allows for selectivity?
Sketches
What is the most important role of the sketch?
To give measurements, scale, and relative placement of all important details in the crime scene
What should sketches include
The date and time Scale Reference points Distance measurements The name of investigators Victims & suspects A legend
Photographs can capture
Details that even the most observant investigator may miss
What should an investigator do before touching or moving any evidence
Photograph the scene
Where should they pay special attention to?
Points of entry and exit
Photographs help
The investigator and witness remember details
They show where evidence is placed in the scene
Help the judge and jury visualize the crime scene
The investigator should include photos that
Clarify the scene
Close-up photos of evidence
Photos of the scene as viewed through the eyes of a witness
Photos of the location of the scene and its surroundings
All photographs should include
A rule for scale and be carefully documented and kept as evidence
Anything that might carry race evidence is
Collected for later examination in the lab
Special lighting may be used
To spot body fluids that would be invisible in normal light
How the investigator carries out the search depends on the
Since of the area, location, and the complexity of the crime scene
Too many investigators _________________, too few investigators ______________.
Get in each other’s way and may destroy evidence, miss evidence
A large area may
Be divided into designated sections for systematic searching
The investigators must put each time collected
In a seperate container or package and label it
The most _______ evidence is collected and packaged first
Fragile
If evidence is found sticking to a larger object…
…the whole garment is collected, packaged, and sent to the lab
What are good containers for most evidence
Pill bottles
Vials
Manila envelops
Plastic bags
Wet items must
Be dried before packaging
Containers should be
Sealed tightly
Biological items
Should be dried and kept in a freezer
Clothing with trace evidence should
Be packed carefully to avoid disturbing the evidence
Firearms should be
Gives rigidly inside a wooden container
Evidence from a suspected arson should be
Kept on an airtight container so that the fumes from an accelerant cannot evaporate
What can be used that picks up everything
A vacuum cleaner and an adhesive tape
What are controls
Samples with a known origin
The first officer steps are
- secure and isolate the crime scene
- observe and document the scene
First officer on the scene
Asses the crime scene and sissy those hurt Detain the witness and suspects Arrests the perpetrator(s) Protect the crime scene Take notes
What does adapt stand for
Asses the crime scene and sissy those hurt Detain the witness and suspects Arrests the perpetrator(s) Protect the crime scene Take notes
Use oblique lighting to
Help reveal items not visible
What can be taken without altering the scene
Photographs
Each piece of evidence must be photographed in
It’s original spot
Take pictures of the body
When it’s there and after its removed
A rough sketch
Employs an accurate depiction of the dimensions of the scene and shows the location of all objects having a bearing on the case
In a sketch all measurements are made with
A tape measure
How to create a sketch
Computer aided drafting (CAD)
Serves as a _____________ when interviewing the suspect
Frame of reference
Sketches give what to photos
Sketches give perspective
What are the 4 types of sketches
Overhead, cross projection, elevation, perspective
A sketch can
- depict entire scene in one visual (a photograph cannot)
- reveal detail of an it me in shadows
- be selective and eliminate distracting confusion
- record spatial relationship between items
What’s the most common and basic style of sketches
Overhead
Inward spiral
The csi starts at the perimeter of the scene and works toward the center (good method when there is only one CSI on the scene)
Parallel
All the members of the CSI team form a line. They walk in a straight line, at the same speed, from one end of the crime scene to the other
Grid search
A grid search is simply two parallel searches off set by 90°, performed one after another. large outdoors area.
Zone search
The csi in charge divides the crime scene into sectors and each team member takes one sector. Team members may then switch sectors and search again to ensure complete coverage.
Collecting evidence autopsy room
Medical examiner carefully examined the victim to establish a cause and manner of death
In an autopsy room what is collected and sent to the lab
- victims clothing
- fingernail scraping
- head and pubic hairs
- blood
- vaginal, anal, and oral swabs
- recovered bullets from the body
- hand swabs
What is better? Paper or plastic
Paper bags are better than plastic
Blood-soaked clothing must not be stored in
Air-tight containers because the trapped moisture may cause the growth of mildew and mold and destroy the blood
Sketching the science can help investigators
To notice and remember details through the simple act of drawing
