ACI Quality Assurance & Compliance 3 — Questions and Answers
Question 1: Under Federal Rules of Evidence Rule 702, expert testimony is admissible when the expert's methodology meets which standard?
- Frye standard only
- Daubert standard (Correct answer)
- Strickland standard
- Brady standard
Correct answer: Daubert standard
Rule 702 was amended in line with Daubert, requiring that expert testimony be based on sufficient facts, reliable methodology, and proper application.
Question 2: A forensic lab receives equipment for calibration but the calibration certificate has expired. What is the correct quality-compliant response?
- Continue using the equipment until the next scheduled maintenance cycle
- Remove the equipment from service until it is recalibrated and certified (Correct answer)
- Use the equipment only for non-case work
- Extend the certificate validity by 30 days per lab policy
Correct answer: Remove the equipment from service until it is recalibrated and certified
Equipment with an expired calibration certificate cannot be relied upon for accurate measurements and must be removed from service immediately.
Question 3: What is the role of a 'technical reviewer' in a digital forensic case under quality compliance frameworks?
- To manage the chain of custody log
- To independently verify the examiner's methods, findings, and conclusions for accuracy (Correct answer)
- To approve the lab's annual budget
- To present findings to law enforcement on behalf of the examiner
Correct answer: To independently verify the examiner's methods, findings, and conclusions for accuracy
A technical reviewer independently checks that the examiner followed proper procedures and that conclusions are supported by the evidence.
Question 4: Which principle ensures that a forensic examination can be repeated by another qualified examiner with the same tools and produce the same results?
- Confidentiality
- Reproducibility (Correct answer)
- Non-repudiation
- Admissibility
Correct answer: Reproducibility
Reproducibility is a core scientific and quality principle requiring that documented methods produce consistent results when repeated under the same conditions.
Question 5: An examiner discovers mid-case that the write-blocker used to acquire evidence was defective and may have modified the drive. What is the priority action?
- Complete the examination and disclose in the final report
- Immediately stop the examination, document the issue, and notify a supervisor (Correct answer)
- Re-image the drive and continue without disclosure
- Verify the drive hash and continue if it matches
Correct answer: Immediately stop the examination, document the issue, and notify a supervisor
A potentially compromised acquisition must be halted immediately and documented so that the integrity concern is addressed through proper quality and legal channels.
Question 6: In ISO/IEC 17025 compliance for forensic labs, what does the term 'measurement uncertainty' refer to?
- The probability that evidence will be lost during transport
- A quantified range within which the true value of a measurement is expected to lie (Correct answer)
- The likelihood that an examiner will make a procedural error
- Uncertainty about whether a case will proceed to trial
Correct answer: A quantified range within which the true value of a measurement is expected to lie
ISO 17025 requires labs to estimate and report measurement uncertainty, acknowledging that no measurement is perfectly precise.
Question 7: Which practice best supports the 'completeness' requirement in forensic reporting under QA standards?
- Only documenting findings that support the prosecution's theory
- Recording all findings, including those that are exculpatory or inconclusive (Correct answer)
- Summarizing only the most significant artifacts in the report
- Reporting findings verbally to avoid creating discoverable documents
Correct answer: Recording all findings, including those that are exculpatory or inconclusive
Completeness requires that forensic reports include all relevant findings, including those that do not support a particular conclusion, to ensure fairness and accuracy.
ACI Quality Assurance & Compliance 3
Under Federal Rules of Evidence Rule 702, expert testimony is admissible when the expert's methodology meets which standard?