TEXAS CRIME SCENE TECHNICIAN
CERTIFICATION EXAM – PRACTICE
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which of the following is the primary responsibility of a
crime scene technician at a scene?
A. Conducting interrogations
B. Collecting and preserving evidence
C. Filing arrest reports
D. Making arrests
Rationale: The crime scene technician’s main role is to
properly collect, document, and preserve evidence to maintain
the integrity of the investigation.
2. When photographing a crime scene, it is essential to:
A. Only photograph the main piece of evidence
B. Photograph the scene from multiple angles including
overall, mid-range, and close-up shots
C. Use only a smartphone camera
D. Photograph only after all evidence is removed
,Rationale: Multiple angles ensure proper documentation and
context for each piece of evidence.
3. The chain of custody is important because it:
A. Shows who is guilty
B. Provides access to the crime scene
C. Maintains the integrity and accountability of evidence
D. Determines the order of processing
Rationale: Maintaining a documented chain of custody
prevents evidence tampering and ensures admissibility in
court.
4. What is the first step upon arriving at a crime scene?
A. Interview witnesses
B. Secure and isolate the scene
C. Collect physical evidence
D. Conduct forensic analysis
Rationale: Securing the scene prevents contamination and
preserves evidence for proper collection.
5. Latent fingerprints are best visualized using:
A. Water
B. Ink pads
C. Powder, chemicals, or alternate light sources
D. UV lights only
,Rationale: Latent prints are invisible to the naked eye and
require powders, chemicals, or light sources to be visualized.
6. Which method is used to document the exact location of
evidence in a crime scene?
A. Fingerprinting
B. Interviewing
C. Sketching and measurements
D. DNA collection
Rationale: Sketches and measurements provide an accurate
record of evidence locations and spatial relationships.
7. When collecting blood evidence, a technician should:
A. Use bare hands
B. Wear gloves and use proper collection techniques
C. Allow it to dry without packaging
D. Mix with other samples
Rationale: Proper handling prevents contamination and
preserves biological evidence.
8. Which type of evidence can be transferred from one
surface to another, as explained by Locard’s Exchange
Principle?
A. Photographs
B. Hair, fibers, and trace materials
C. Written notes
D. Weapon serial numbers
, Rationale: Locard’s Exchange Principle states that every
contact leaves a trace.
9. What is the most common fingerprint pattern?
A. Arch
B. Loop
C. Whorl
D. Tented arch
Rationale: Loops are the most frequently observed fingerprint
pattern in the general population.
10. The proper packaging for a bloody clothing item is:
A. Plastic bag
B. Paper bag
C. Ziploc bag
D. Aluminum foil
Rationale: Paper allows the evidence to breathe, preventing
mold and degradation.
11. When collecting hair evidence, a technician should:
A. Only collect from the victim
B. Collect multiple hairs, including roots if possible, from
relevant locations
C. Only collect the longest strands
D. Discard contaminated hairs
CERTIFICATION EXAM – PRACTICE
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A | INSTANT DOWNLOAD PDF
1. Which of the following is the primary responsibility of a
crime scene technician at a scene?
A. Conducting interrogations
B. Collecting and preserving evidence
C. Filing arrest reports
D. Making arrests
Rationale: The crime scene technician’s main role is to
properly collect, document, and preserve evidence to maintain
the integrity of the investigation.
2. When photographing a crime scene, it is essential to:
A. Only photograph the main piece of evidence
B. Photograph the scene from multiple angles including
overall, mid-range, and close-up shots
C. Use only a smartphone camera
D. Photograph only after all evidence is removed
,Rationale: Multiple angles ensure proper documentation and
context for each piece of evidence.
3. The chain of custody is important because it:
A. Shows who is guilty
B. Provides access to the crime scene
C. Maintains the integrity and accountability of evidence
D. Determines the order of processing
Rationale: Maintaining a documented chain of custody
prevents evidence tampering and ensures admissibility in
court.
4. What is the first step upon arriving at a crime scene?
A. Interview witnesses
B. Secure and isolate the scene
C. Collect physical evidence
D. Conduct forensic analysis
Rationale: Securing the scene prevents contamination and
preserves evidence for proper collection.
5. Latent fingerprints are best visualized using:
A. Water
B. Ink pads
C. Powder, chemicals, or alternate light sources
D. UV lights only
,Rationale: Latent prints are invisible to the naked eye and
require powders, chemicals, or light sources to be visualized.
6. Which method is used to document the exact location of
evidence in a crime scene?
A. Fingerprinting
B. Interviewing
C. Sketching and measurements
D. DNA collection
Rationale: Sketches and measurements provide an accurate
record of evidence locations and spatial relationships.
7. When collecting blood evidence, a technician should:
A. Use bare hands
B. Wear gloves and use proper collection techniques
C. Allow it to dry without packaging
D. Mix with other samples
Rationale: Proper handling prevents contamination and
preserves biological evidence.
8. Which type of evidence can be transferred from one
surface to another, as explained by Locard’s Exchange
Principle?
A. Photographs
B. Hair, fibers, and trace materials
C. Written notes
D. Weapon serial numbers
, Rationale: Locard’s Exchange Principle states that every
contact leaves a trace.
9. What is the most common fingerprint pattern?
A. Arch
B. Loop
C. Whorl
D. Tented arch
Rationale: Loops are the most frequently observed fingerprint
pattern in the general population.
10. The proper packaging for a bloody clothing item is:
A. Plastic bag
B. Paper bag
C. Ziploc bag
D. Aluminum foil
Rationale: Paper allows the evidence to breathe, preventing
mold and degradation.
11. When collecting hair evidence, a technician should:
A. Only collect from the victim
B. Collect multiple hairs, including roots if possible, from
relevant locations
C. Only collect the longest strands
D. Discard contaminated hairs
