Storage & Preservation Flashcards
7 cards from real ETC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Storage & Preservation flashcards as text
Which of the following is a PRIMARY concern when storing luminescent or fluorescent evidence markers used in crime scene documentation?
Answer: Exposure to ultraviolet light causing fading
Fluorescent markers degrade under prolonged UV exposure; they should be stored in opaque, sealed containers away from light sources.
A porous surface swab containing touch DNA is BEST preserved by:
Answer: Air-drying and then storing in a paper envelope in a cool, dry location
Touch DNA swabs must be air-dried before packaging to prevent microbial growth, then stored cool and dry to maintain DNA integrity.
What is the purpose of using tamper-evident tape on evidence packaging?
Answer: To provide visible indication if a package has been opened
Tamper-evident tape leaves a visible pattern or void message if removed, providing proof that a package has been accessed without authorization.
When storing controlled substance evidence for an extended period, which condition poses the GREATEST risk of degradation?
Answer: Temperature fluctuations and high humidity
Temperature fluctuations and humidity accelerate chemical decomposition of controlled substances, potentially altering potency measurements used in prosecution.
A technician packages a knife with dried blood in a cardboard box. What labeling information is LEAST critical to include on the outside of the package?
Answer: The technician's favorite evidence locker
A technician's personal preferences have no evidentiary relevance; all other listed elements are required for proper chain of custody and safe handling.
Which protocol governs the destruction or disposal of biological evidence after a case is adjudicated?
Answer: Applicable jurisdiction's evidence retention policy and court approval
Evidence destruction requires adherence to the jurisdiction's retention policy and, in many cases, court authorization, especially in serious felony cases where post-conviction review is possible.
Why should different types of evidence (e.g., firearms, chemicals, biologicals) be stored in separate areas of an evidence room?
Answer: To prevent cross-contamination and comply with safety regulations
Segregated storage prevents cross-contamination between evidence types and ensures proper environmental conditions and safety measures for each category.