ABMDI Death Scene Investigation Basics Exam Prep – Real Practice Questions,
Answers & Detailed Rationales (Updated 2026) | Medicolegal Death Investigation
Procedures, Scene Documentation & Evidence Collection, Postmortem Changes &
Time of Death Estimation, Injury Pattern Recognition, Chain of Custody, Forensic
Photography, Autopsy Coordination, Trauma & Toxicology Basics, ABMDI
Certification Review
Question 1: What is the FIRST priority upon arriving at a death scene?
A. Photograph the decedent's position
B. Confirm or pronounce death
C. Exercise scene safety
D. Interview witnesses
CORRECT ANSWER: C. Exercise scene safety
Rationale: Scene safety is the paramount initial concern for any death investigator.
Before any investigative activities can proceed, the investigator must ensure the scene
is secure and free from hazards such as biohazards, structural instability, hazardous
materials, or potential violence. This protects the investigator, other responders, and
preserves the integrity of the scene for subsequent examination.
www.ojp.gov
Question 2: Which of the following is the PRIMARY purpose of establishing chain of
custody at a death scene?
A. To expedite the release of the body to the funeral home
B. To document the chronological handling of evidence for legal admissibility
C. To determine the cause of death at the scene
D. To identify the next of kin
CORRECT ANSWER: B. To document the chronological handling of evidence for
legal admissibility
Rationale: Chain of custody provides a documented, unbroken record of who has
handled evidence, when, and for what purpose. This documentation is critical for
maintaining the integrity and admissibility of physical evidence in legal proceedings.
Any break in the chain can compromise the evidentiary value of collected items.
www.ojp.gov
Question 3: When documenting postmortem changes, which finding is MOST
indicative of the body having been moved after death?
A. Uniform livor mortis consistent with body position
B. Rigor mortis fully established in all muscle groups
C. Livor mortis inconsistent with the position in which the body was found
D. Moderate decomposition with insect activity
CORRECT ANSWER: C. Livor mortis inconsistent with the position in which the
body was found
,Rationale: Livor mortis (lividity) is the settling of blood in dependent body parts after
circulation ceases. If lividity patterns do not correspond to the position in which the
body was discovered, this strongly suggests the body was repositioned after death,
which is a critical investigative finding that may indicate foul play or scene alteration.
www.ojp.gov
Question 4: Which method of decedent identification is considered the MOST
scientifically reliable?
A. Visual identification by a family member
B. Personal effects found on the body
C. Fingerprint comparison
D. Clothing description
CORRECT ANSWER: C. Fingerprint comparison
Rationale: Fingerprint comparison is a scientifically validated method of positive
identification based on unique, unchanging ridge patterns. While visual identification
and personal effects can provide preliminary leads, they are subjective and potentially
unreliable. Fingerprint analysis, along with dental records and DNA, constitutes the gold
standard for definitive decedent identification.
www.ojp.gov
Question 5: What is the PRIMARY purpose of conducting a scene "walk-through"
before collecting evidence?
A. To determine the time of death
B. To identify potential hazards and establish an investigative plan
C. To interview witnesses immediately
D. To photograph the decedent from all angles
CORRECT ANSWER: B. To identify potential hazards and establish an investigative
plan
Rationale: The initial scene walk-through allows investigators to assess the overall
scene, identify potential hazards (biohazards, structural dangers, evidence locations),
and develop a systematic approach for documentation and evidence collection. This
preliminary assessment prevents contamination, ensures thoroughness, and guides the
sequence of investigative activities.
www.ojp.gov
Question 6: Which of the following is a CORRECT procedure when preserving trace
evidence on a decedent's hands?
A. Place plastic bags over the hands and seal tightly
B. Place unused paper bags over the hands and secure loosely
,C. Wash the hands to preserve biological evidence
D. Remove fingernail clippings at the scene
CORRECT ANSWER: B. Place unused paper bags over the hands and secure loosely
Rationale: Paper bags are used to cover the decedent's hands to preserve trace
evidence such as fibers, hair, or gunshot residue while allowing moisture to evaporate,
preventing degradation of biological evidence. Plastic bags trap moisture and promote
mold growth, which can destroy evidence. Evidence collection like fingernail clippings
should typically be performed in a controlled environment, not at the scene.
www.ojp.gov
Question 7: When should the investigator document the decedent's medical
history?
A. Only if the death appears suspicious
B. After the autopsy has been completed
C. During the scene investigation as part of profile development
D. Only when requested by the pathologist
CORRECT ANSWER: C. During the scene investigation as part of profile
development
Rationale: Documenting the decedent's medical history is an essential component of
establishing the decedent profile during the scene investigation. This information helps
focus the investigation, aids in determining cause and manner of death, and may
identify the need for specific postmortem examinations or toxicological studies.
Gathering this information early ensures completeness and accuracy.
www.ojp.gov
Question 8: Which of the following BEST describes the investigator's responsibility
regarding next of kin notification?
A. Notification is solely the responsibility of law enforcement
B. The investigator must ensure notification occurs and document all attempts
C. Notification should be delayed until autopsy results are available
D. The investigator should personally deliver notification in all cases
CORRECT ANSWER: B. The investigator must ensure notification occurs and
document all attempts
Rationale: The death investigator bears responsibility for ensuring that next of kin are
notified of the death in a timely and compassionate manner. This includes documenting
all attempts at notification, whether successful or unsuccessful, to create a clear
record. While the actual notification may be delegated to appropriate personnel (e.g.,
law enforcement, clergy), the investigator must confirm completion and maintain
documentation.
, www.ojp.gov
Question 9: What is the PRIMARY reason for photographing the scene before any
items are moved?
A. To create evidence for media release
B. To document the scene as initially found for investigative and legal purposes
C. To satisfy insurance requirements
D. To assist the funeral director in body preparation
CORRECT ANSWER: B. To document the scene as initially found for investigative
and legal purposes
Rationale: Photographing the scene in its unaltered state provides an objective,
permanent record of the scene conditions, evidence locations, and spatial
relationships at the time of discovery. This documentation is critical for investigative
analysis, reconstruction, and potential legal proceedings, as it preserves information
that may be lost once the scene is disturbed.
www.ojp.gov
Question 10: Which postmortem change is typically the FIRST to appear after
death?
A. Rigor mortis
B. Algor mortis
C. Livor mortis
D. Decomposition
CORRECT ANSWER: C. Livor mortis
Rationale: Livor mortis (postmortem lividity) typically begins to develop within 20
minutes to 2 hours after death as blood settles in dependent body parts due to gravity.
Algor mortis (body cooling) begins immediately but is measured over time. Rigor mortis
usually begins 2-6 hours postmortem, and visible decomposition typically appears after
24-48 hours depending on environmental conditions.
www.ojp.gov
Question 11: When collecting blood specimens at a death scene for toxicological
analysis, which container is MOST appropriate?
A. Plain glass vial
B. Gray-top tube containing sodium fluoride and potassium oxalate
C. Red-top tube without additives
D. Plastic specimen cup
CORRECT ANSWER: B. Gray-top tube containing sodium fluoride and potassium
oxalate
Answers & Detailed Rationales (Updated 2026) | Medicolegal Death Investigation
Procedures, Scene Documentation & Evidence Collection, Postmortem Changes &
Time of Death Estimation, Injury Pattern Recognition, Chain of Custody, Forensic
Photography, Autopsy Coordination, Trauma & Toxicology Basics, ABMDI
Certification Review
Question 1: What is the FIRST priority upon arriving at a death scene?
A. Photograph the decedent's position
B. Confirm or pronounce death
C. Exercise scene safety
D. Interview witnesses
CORRECT ANSWER: C. Exercise scene safety
Rationale: Scene safety is the paramount initial concern for any death investigator.
Before any investigative activities can proceed, the investigator must ensure the scene
is secure and free from hazards such as biohazards, structural instability, hazardous
materials, or potential violence. This protects the investigator, other responders, and
preserves the integrity of the scene for subsequent examination.
www.ojp.gov
Question 2: Which of the following is the PRIMARY purpose of establishing chain of
custody at a death scene?
A. To expedite the release of the body to the funeral home
B. To document the chronological handling of evidence for legal admissibility
C. To determine the cause of death at the scene
D. To identify the next of kin
CORRECT ANSWER: B. To document the chronological handling of evidence for
legal admissibility
Rationale: Chain of custody provides a documented, unbroken record of who has
handled evidence, when, and for what purpose. This documentation is critical for
maintaining the integrity and admissibility of physical evidence in legal proceedings.
Any break in the chain can compromise the evidentiary value of collected items.
www.ojp.gov
Question 3: When documenting postmortem changes, which finding is MOST
indicative of the body having been moved after death?
A. Uniform livor mortis consistent with body position
B. Rigor mortis fully established in all muscle groups
C. Livor mortis inconsistent with the position in which the body was found
D. Moderate decomposition with insect activity
CORRECT ANSWER: C. Livor mortis inconsistent with the position in which the
body was found
,Rationale: Livor mortis (lividity) is the settling of blood in dependent body parts after
circulation ceases. If lividity patterns do not correspond to the position in which the
body was discovered, this strongly suggests the body was repositioned after death,
which is a critical investigative finding that may indicate foul play or scene alteration.
www.ojp.gov
Question 4: Which method of decedent identification is considered the MOST
scientifically reliable?
A. Visual identification by a family member
B. Personal effects found on the body
C. Fingerprint comparison
D. Clothing description
CORRECT ANSWER: C. Fingerprint comparison
Rationale: Fingerprint comparison is a scientifically validated method of positive
identification based on unique, unchanging ridge patterns. While visual identification
and personal effects can provide preliminary leads, they are subjective and potentially
unreliable. Fingerprint analysis, along with dental records and DNA, constitutes the gold
standard for definitive decedent identification.
www.ojp.gov
Question 5: What is the PRIMARY purpose of conducting a scene "walk-through"
before collecting evidence?
A. To determine the time of death
B. To identify potential hazards and establish an investigative plan
C. To interview witnesses immediately
D. To photograph the decedent from all angles
CORRECT ANSWER: B. To identify potential hazards and establish an investigative
plan
Rationale: The initial scene walk-through allows investigators to assess the overall
scene, identify potential hazards (biohazards, structural dangers, evidence locations),
and develop a systematic approach for documentation and evidence collection. This
preliminary assessment prevents contamination, ensures thoroughness, and guides the
sequence of investigative activities.
www.ojp.gov
Question 6: Which of the following is a CORRECT procedure when preserving trace
evidence on a decedent's hands?
A. Place plastic bags over the hands and seal tightly
B. Place unused paper bags over the hands and secure loosely
,C. Wash the hands to preserve biological evidence
D. Remove fingernail clippings at the scene
CORRECT ANSWER: B. Place unused paper bags over the hands and secure loosely
Rationale: Paper bags are used to cover the decedent's hands to preserve trace
evidence such as fibers, hair, or gunshot residue while allowing moisture to evaporate,
preventing degradation of biological evidence. Plastic bags trap moisture and promote
mold growth, which can destroy evidence. Evidence collection like fingernail clippings
should typically be performed in a controlled environment, not at the scene.
www.ojp.gov
Question 7: When should the investigator document the decedent's medical
history?
A. Only if the death appears suspicious
B. After the autopsy has been completed
C. During the scene investigation as part of profile development
D. Only when requested by the pathologist
CORRECT ANSWER: C. During the scene investigation as part of profile
development
Rationale: Documenting the decedent's medical history is an essential component of
establishing the decedent profile during the scene investigation. This information helps
focus the investigation, aids in determining cause and manner of death, and may
identify the need for specific postmortem examinations or toxicological studies.
Gathering this information early ensures completeness and accuracy.
www.ojp.gov
Question 8: Which of the following BEST describes the investigator's responsibility
regarding next of kin notification?
A. Notification is solely the responsibility of law enforcement
B. The investigator must ensure notification occurs and document all attempts
C. Notification should be delayed until autopsy results are available
D. The investigator should personally deliver notification in all cases
CORRECT ANSWER: B. The investigator must ensure notification occurs and
document all attempts
Rationale: The death investigator bears responsibility for ensuring that next of kin are
notified of the death in a timely and compassionate manner. This includes documenting
all attempts at notification, whether successful or unsuccessful, to create a clear
record. While the actual notification may be delegated to appropriate personnel (e.g.,
law enforcement, clergy), the investigator must confirm completion and maintain
documentation.
, www.ojp.gov
Question 9: What is the PRIMARY reason for photographing the scene before any
items are moved?
A. To create evidence for media release
B. To document the scene as initially found for investigative and legal purposes
C. To satisfy insurance requirements
D. To assist the funeral director in body preparation
CORRECT ANSWER: B. To document the scene as initially found for investigative
and legal purposes
Rationale: Photographing the scene in its unaltered state provides an objective,
permanent record of the scene conditions, evidence locations, and spatial
relationships at the time of discovery. This documentation is critical for investigative
analysis, reconstruction, and potential legal proceedings, as it preserves information
that may be lost once the scene is disturbed.
www.ojp.gov
Question 10: Which postmortem change is typically the FIRST to appear after
death?
A. Rigor mortis
B. Algor mortis
C. Livor mortis
D. Decomposition
CORRECT ANSWER: C. Livor mortis
Rationale: Livor mortis (postmortem lividity) typically begins to develop within 20
minutes to 2 hours after death as blood settles in dependent body parts due to gravity.
Algor mortis (body cooling) begins immediately but is measured over time. Rigor mortis
usually begins 2-6 hours postmortem, and visible decomposition typically appears after
24-48 hours depending on environmental conditions.
www.ojp.gov
Question 11: When collecting blood specimens at a death scene for toxicological
analysis, which container is MOST appropriate?
A. Plain glass vial
B. Gray-top tube containing sodium fluoride and potassium oxalate
C. Red-top tube without additives
D. Plastic specimen cup
CORRECT ANSWER: B. Gray-top tube containing sodium fluoride and potassium
oxalate
