Intro to Forensic Science_C4
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Slide 1 - Collection of Crime Scene Evidence
- Chapter 4
Slide 2 - Physical Evidence
- Any object that can establish that a crime has been committed or can link a crime to its victim or perpetrator.
Slide 3 - Evidence collection Tools
- Pen (Black/blue)
- Magnifying glass
- Flashlight (day & night)
- Disposable forceps type tools
- Scapels/Razor blades
- Swabs & medicine droppers (presumptive tests)
- Gause or sterile cloth
- Unbreakable plastic pill bottles
- Evidence sealing tape
- Evidence tags
- Paper bags,boxes, etc
- Alternate light sources
- Lifting tape
- Vaccum collector w/filter
- Fingerprint powders
Slide 5 - Collecting and Packaging
- Handling evidence
- Packaging Evidence
- Biological materials
- DNA Evidence
- Druggist fold
Slide 6 - Contamination
- The transfer of extraneous matter between the collector and the evidence or multiple pieces of evidence, producing tainted evidence that cannot be used in the subsequent investigation.
Slide 7 - Chain-of-Custody
- A list of all people who came into possession of an item of evidence.
Slide 8 - Standard or Reference Sample
- Physical evidence whose origin is known, such as blood, or hair taken from suspect or victim.
Slide 9 - Buccal Swab
- A swab of the inner portion of the cheek; performed to collect cells for use in determining the DNA profile of an individual.
Slide 10 - Substrate Controls
- Surface material close to areas where physical evidence has been deposited.
Slide 11 - Submitting Evidence
Slide 12 - Crime Scene Safety
- Blood borne pathogens
Slide 13 - Legal Considerations at the Crime Scene
- Search and seizure covered by Fourth Amendment
- 1960’s saw several decisions by the SCOUS which impacted law enforcement searches
- Four warrant less search situations
- Mincey Case (Homicide)
- Tyler Case (Fire scene investigation)
Slide 14 - Closing