CFC Evidence Collection & Case Analysis 4 — Questions and Answers
Question 1: During crime scene investigation, what is the correct order of operations when processing physical evidence?
- Collect, document, photograph, then package
- Document, photograph, collect, then package (Correct answer)
- Package, photograph, document, then analyze
- Analyze, photograph, collect, then document
Correct answer: Document, photograph, collect, then package
Evidence must be documented and photographed in place before collection to preserve its original context and location.
Question 2: A forensic consultant is retained in a product liability case involving alleged defects. Which type of analysis BEST determines whether a product failed due to design defect versus manufacturing defect?
- Survey analysis of customer complaints over time
- Comparative engineering analysis of the specific unit against design specifications (Correct answer)
- Statistical review of warranty claim rates
- Interview-based assessment of user error patterns
Correct answer: Comparative engineering analysis of the specific unit against design specifications
Comparing the specific product against its design specifications reveals whether the failure resulted from a flaw in the design itself or a deviation during manufacturing.
Question 3: Which analytical technique is used to identify the chemical composition of unknown substances found at a crime scene without destroying the sample?
- Gas chromatography-mass spectrometry (GC-MS)
- Non-destructive X-ray fluorescence (XRF) spectroscopy (Correct answer)
- Thin-layer chromatography (TLC) with chemical staining
- High-performance liquid chromatography (HPLC)
Correct answer: Non-destructive X-ray fluorescence (XRF) spectroscopy
XRF is a non-destructive technique that can identify elemental composition while preserving the original sample.
Question 4: A forensic consultant conducting a workplace investigation discovers that key emails were deleted from a server 48 hours after a litigation hold notice was issued. What legal concept is MOST applicable?
- Inadvertent disclosure under Federal Rule 502
- Spoliation of evidence, potentially triggering adverse inference instructions (Correct answer)
- Work product doctrine protecting internal communications
- The business records exception to the hearsay rule
Correct answer: Spoliation of evidence, potentially triggering adverse inference instructions
Destroying evidence after a litigation hold is issued constitutes spoliation, which courts may address with sanctions including adverse inference jury instructions.
Question 5: In forensic entomology, the minimum post-mortem interval (PMI) is estimated primarily by analyzing which factor?
- The temperature of the remains at discovery
- The developmental stage of the oldest insect colony present on the remains (Correct answer)
- The species diversity of insects found at the scene
- The geographic location relative to known insect habitats
Correct answer: The developmental stage of the oldest insect colony present on the remains
The oldest/most developed insect colony present indicates when the first insects colonized the remains, establishing the minimum time since death.
Question 6: When a forensic consultant prepares a written report, which element is MOST critical to maintain the report's credibility and admissibility?
- Using technical jargon to demonstrate expertise
- Clearly distinguishing between objective findings and the expert's opinions (Correct answer)
- Limiting the report to conclusions without methodology details
- Avoiding any reference to evidence that does not support the client's position
Correct answer: Clearly distinguishing between objective findings and the expert's opinions
A credible forensic report must clearly separate objective factual findings from interpretive opinions to allow proper judicial evaluation.
Question 7: Which federal rule governs the admissibility of expert testimony in U.S. federal courts and requires the judge to act as a 'gatekeeper'?
- Federal Rule of Evidence 602 (Personal Knowledge)
- Federal Rule of Evidence 702 (Testimony by Expert Witnesses) as interpreted in Daubert (Correct answer)
- Federal Rule of Civil Procedure 26 (Expert Disclosures)
- Federal Rule of Evidence 803 (Hearsay Exceptions)
Correct answer: Federal Rule of Evidence 702 (Testimony by Expert Witnesses) as interpreted in Daubert
FRE 702, shaped by the Daubert trilogy, requires judges to evaluate whether expert testimony rests on sufficient facts, reliable methodology, and appropriate application.
CFC Evidence Collection & Case Analysis 4
During crime scene investigation, what is the correct order of operations when processing physical evidence?