Collection and Preservation of Evidence Flashcards
How should blood be stored
In a fridge
How should urine be stored
Frozen
When collecting a biological specimen, what piece of info needs to be in the item description?
The persons name whom it was collected from
What are the preferred sample choices when collecting biological specimens for alcohol?
Blood
what are the preferred sample choices when collecting biological specimens for drugs?
Urine
What needs to be documented when collecting a firearm?
-A full description including the make, model, caliber, type, and serial number
-Position of the hammer, cylinder, and safety
What type of packaging should fire debris be placed in?
Lined paint cans
How should marijuana be documented in your narrative and on the evidence package?
“Green leafy substance”
“green plant material”
what kind of packaging should biological evidence not be placed into?
Plastic bags
How should wet items be handled?
Fully air dried
What are examples of biological evidence?
Blood, urine, saliva, semen, etc
What is chain of custody?
Chronological documentation
of the seizure, custody, control, and transfer of evidence
When should hazard labels be used?
For fentanyl, needles, acid, drugs, blood
What is cross-contamination?
Two items of evidence make contact
What are reasons we seal evidence packaging?
Preserve it, prevent contamination, prevent tampering
How much extra room should there be in evidence packaging?
Enough room where the evidence tech can open and reseal it
Definition of Evidence
-Probative value to prove or disprove a fact
-Can be used in a criminal or civil case
Definition of Property
-Items that do not have evidentiary value
-Found, safekeeping or destruction
Types of evidence
-Biology
-Digital/electronics
-Fire debris
-Firearms
-Impression evidence
-Drugs
-Questioned documents
-Toxicology
-Trace
-weapons
External packaging includes?
Paper envelope, paper sack, cardboard box, heat seal plastic, metal can
Internal packaging includes
-Heat seal/zipper top baggie (drugs)
-Screw top vial (liquids)
-Syringe tubes (sharps)
-Small envelopes/bindles (trace)
-Signal-blocking pouches (digital/electronics
When swabbing dry blood you should…
Moisten the two swabs with distilled water
Packaging evidence should be used to…
-Prevent cross-contamination
-Prevent loss or unintentional obliteration
Evidence seals prevent-
-Contamination
-Cross-contamination
-Loss of evidence
-Tampering of evidence
Always use appropriate _____ when handling evidence
PPE
personal protective equipment
True or False- All biological evidence must be packaged in internal and external packaging
True
If biological evidence is being submitted both for biological and latent processing you should store it at?
Room temp
I.C. title 67 chapter 29 mandates?
-How sexual assault kits will be handled, processed, and restrained.
How should you swab a hand?
-Use one set of swabs for one hand
-be sure to get under the fingernail
Condoms that contain fluids should be packaged to…
Preserve potential DNA on the interior and exterior of the condom. After drying, package in doubled paper envelopes/bags
Fetal tissue must be…
separated from other tissue, placed in an airtight plastic container, and stored frozen. do not submit without prior notification
What is the CODIS database?
-( Combined DNA Index System)
-Contains convict offender samples(all felons in ID) , samples of unknown subjects, and samples derived from evidence
Any wet drug item (mushrooms, marijuana plants) must be ____ prior to packaging
Completely air dried
Internal & external packaging for drugs
Internal- (Heat seal plastic pouches, zipper top baggies)
-External- (Paper evidence envelope or bag)
Packaging for Firearms
-Cardboard gun box
-Use numerous zip ties around the frame to secure it to the box, (no zip ties in the barrel)
If shipping a firearm via USPS, the magazine should be…
Placed in a separate
package than the firearm.
Common types of Impression evidence are?
-Footwear impression evidence
-latent prints
-Tire tracks
-Tool marks
May collect entire item, portion, photograph, lift of impression, and or a cast of the impression.
Comparison quality photos are ideally taken with…
-Camera mounted on a tripod so that plane of the camera is 90 degrees to surface of the item
-A loss-less format
-proper illumination & exposure
-Proper focus
-A scale included
-The impression filling the frame as much as possible
Casting of footwear and tire impressions is usually accomplished using?
Dental stone
Wax spray can fix?
Snow impressions and increase contrast for photography
Aerosol hairspray can help fix?
Dust impressions
Evidence photographs should be taken with a?
A scale
True or false -Numerous latent lift cards can be placed together in one evidence package
True
What alcohol analysis test should be the last resort?
Urine alcohol test
Examples of trace evidence
Hairs, fibers, wood chips, metal shavings, vegetation soil
Ways to package trace evidence
Internal:
-Glassine envelope, coin envelope, druggist’s fold, adhesive lift in sheet protector
External;
-Paper envelope or sack
When executing a search warrant you must leave…
An inventory and a copy of the search warrant at the location
The inventory of a search warrant must include
-Date
-List of items taken
-Signature of one detective/officer
-Signature of one witness (Officer, /detective/assistant)
