Crime Scene Investigation Flashcards
preliminary actions by the first responders
- deal with emergencies
- identify, separate, detain, and obtain immediate helpful information from the crime reporters
- summon assistance
- secure the scene
- avoid disturbing the scene as much as possible
- keep a security log
variety in a crime scene
- size
- complexity
- personnel
- time elapsed
- crime
7 S’s of Crime Scene Investigation
- secure the scene
- separate the witnesses
- scan the scene
- see the scene
- sketch the scene
- search for evidence
- secure and collect evidence
scanning the scene
- stop and walk through the scene if possible
- look for what sticks out
1° scene
the scene where the crime was commit
2° scene
the secondary scene
sketching the scene
- label north
- add scale and legend
- all major objects included
- date, time, location, case #, crime, and names
what to capture in crime scene photos
- overall
- intermediate
- close up and examination of images with accurate spatial relationships
overall photo
the overall location where the crime took place
intermediate photo
the exact place where the crime took place, before and after the markers are placed
what to avoid when taking crime scene photos
- distortion
- color
- lighting
what to include in close up photos
- identifying marks
- take pictures with and without a ruler
high priority collection items
- body and the things on it (DNA, gunpowder, etc)
- foot prints and finger prints
- anything with DNA or biological material
- anything easily disturbed
if collected wet…
temporary wet storage and then dry it out
if collected dry…
store in breathable containers
chain of custody
a process used to maintain and document the chronological history of evidence
the chain of collection should include…
- original collection info
- description of each item
- each person who had custody of items
- date and time of transfer
