Mixed Deck — All ABFM Topics Flashcards

Under the Violence Against Women Act (VAWA), sexual assault forensic examinations must be:

Answer: Available to victims regardless of whether they report to law enforcement

VAWA requires that jurisdictions receiving federal funding provide sexual assault forensic exams at no cost to the victim, without conditioning the exam on reporting to law enforcement.

When performing an independent medical examination (IME) for a defense attorney, the forensic physician's primary duty is to:

Answer: Produce an objective, unbiased medical assessment

IME physicians must remain objective regardless of which party retains them, as their credibility depends on impartiality.

Why must evidence be sealed?

Answer: To prevent tampering and maintain chain of custody

Sealing evidence in tamper-evident packaging immediately after collection is crucial to protect its integrity. The seal ensures that the evidence remains undisturbed and unaltered from the point of collection until it reaches the laboratory or court. This practice is a fundamental component of maintaining the chain of custody, proving that the evidence has not been compromised.

When two forensic experts for opposing parties reach contradictory conclusions, this most commonly reflects:

Answer: Inherent ambiguity in evidence and legitimate interpretive differences

Legitimate experts can reach different conclusions based on evidence interpretation, methodology emphasis, and scientific uncertainty.

In a suspected drug-facilitated sexual assault (DFSA) death, which specimen provides the longest detection window for gamma-hydroxybutyrate (GHB)?

Answer: Hair

GHB is eliminated rapidly from blood and urine (within hours), but hair analysis can document exposure weeks to months after the event.

What is the primary goal of forensic toxicology?

Answer: To analyze toxins related to death

Forensic toxicology is the application of toxicology for legal purposes, primarily focusing on the detection and identification of drugs, poisons, and other chemical substances in biological samples. Its main goal is to determine if these substances were present and contributed to a person's death or impairment. This analysis is crucial for understanding the cause and circumstances of death in suspected poisoning or drug overdose cases.

What is the role of a forensic entomologist in a criminal investigation?

Answer: Estimate PMI and potentially determine if the body was moved

Forensic entomologists use insect evidence to estimate the postmortem interval and can detect scene inconsistencies suggesting the body was relocated.

A forensic expert is asked to opine on a case involving cultural or socioeconomic factors outside their personal experience. Best practice requires:

Answer: Acknowledging the limitation, consulting relevant literature, or deferring to a more qualified expert

Competence in forensic medicine includes recognizing the limits of one's knowledge; cultural or socioeconomic factors outside one's expertise may require consultation or referral.

Postmortem redistribution most significantly affects which class of drugs, leading to overestimation of antemortem levels?

Answer: Lipophilic basic drugs with large volumes of distribution

Lipophilic basic drugs with large volumes of distribution (e.g., tricyclic antidepressants, methadone) concentrate in solid organs and redistribute postmortem into central blood.

A Six Sigma project team is determining defect rates. Which metric expresses defects per million opportunities (DPMO)?

Answer: Sigma level

Sigma level is directly derived from DPMO; 6 Sigma corresponds to 3.4 DPMO.

A forensic medicine expert is asked to testify about cause of death in a homicide trial. Which foundational requirement must the expert satisfy first?

Answer: They must be qualified by the court as an expert in the relevant field

Before offering expert opinions, a witness must be formally qualified by the court as an expert in the relevant area of expertise.

In forensic risk assessment, 'dynamic risk factors' differ from static factors because they:

Answer: Can change over time and with intervention

Dynamic risk factors are modifiable variables such as substance use or antisocial attitudes that can be altered through treatment and intervention.

In accredited forensic laboratories, proficiency testing (PT) results that fall outside acceptable performance criteria MUST be:

Answer: Investigated through root cause analysis and documented with corrective actions

Accreditation standards such as ISO/IEC 17025 require that PT failures trigger documented investigations and corrective actions to maintain accreditation status.

What is skeletonization in the context of decomposition?

Answer: Exposure of bones after removal of all soft tissue

Skeletonization is the final decomposition stage where all soft tissue has been removed, leaving only bone.

How can postmortem redistribution affect toxicology results?

Answer: It affects drug levels after death

Postmortem redistribution (PMR) refers to the phenomenon where drug concentrations in various tissues and fluids change after death. This occurs due to continued diffusion from highly concentrated organs into surrounding blood, as well as cellular breakdown. Consequently, drug levels measured in postmortem samples may not accurately reflect the concentration at the time of death, posing a significant challenge for forensic toxicologists.

Which substance is uniquely identified by the 'alcohol dehydrogenase' enzymatic assay producing a false positive if the sample contains isopropanol?

Answer: Ethanol

Enzymatic ethanol assays can cross-react with other alcohols like isopropanol, so gas chromatography headspace analysis is required to distinguish individual alcohol species.

Which of the five recognized stages of human decomposition is characterized by gas accumulation and bloating?

Answer: Bloat

The bloat stage follows the fresh stage and is marked by gas production from anaerobic bacteria causing visible distension of the body.

A forensic physician receives a call from a journalist requesting comment on a high-profile case in which they served as an expert. The appropriate response is to:

Answer: Decline to comment and refer the journalist to retaining counsel

Forensic experts should not make public statements about active cases without counsel's authorization, as doing so can prejudice proceedings and violate confidentiality obligations.

In sexual assault cases, why are specimens from a sexual assault forensic evidence (SAFE) kit stored refrigerated rather than frozen?

Answer: Ice crystal formation can lyse cells and degrade cellular DNA

Ice crystal formation during freezing can rupture cells, degrade genomic DNA, and compromise sperm morphology, making refrigeration the preferred short-term storage method.

How should ABFM professionals stay current with regulatory changes?

Answer: Actively monitor updates through professional associations and continuing education

ABFM professionals must proactively monitor regulatory changes through professional associations, government publications, and continuing education.