TEXAS FORENSIC SCIENTIST I EXAMINATION – PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Chain of Custody and Evidence Handling*
*General Laboratory Safety and OSHA*
*Texas Code of Criminal Procedure*
*Ethics and Professional Responsibility*
*Quality Assurance and Control*
*Foundational Biology and Chemistry*
*Legal Testimony and Courtroom decorum*
*Instrumental Analysis*
*INTRODUCTION*
The purpose of the Texas Forensic Scientist I Examination is to assess the competency and foundational
knowledge of entry-level forensic professionals. This examination evaluates a candidate’s understanding of
rigorous scientific principles, state-specific legal requirements, and the ethical standards necessary for
maintaining the integrity of the criminal justice system. The assessment consists of multiple-choice and scenario-
based questions designed to mirror real-world laboratory challenges and courtroom demands. By focusing on
critical thinking and the application of technical skills, this exam ensures that practitioners possess the requisite
expertise to provide accurate, unbiased, and defensible scientific results for the citizens of Texas.
*SECTION ONE*
, 1. Which Texas legislative body is responsible for the oversight and accreditation of forensic laboratories
within the state?
A. Texas Department of Public Safety
B. Texas Forensic Science Commission
C. Office of the Attorney General
D. Texas Board of Professional Scientists
🟢 B. Texas Forensic Science Commission
🔴 RATIONALE: The Texas Forensic Science Commission (TFSC) is mandated by state law to oversee
laboratory accreditation and the licensing of forensic analysts in Texas.
2. A forensic scientist receives a sealed evidence bag with a torn corner that has been taped over without
initials. What is the first step the scientist should take?
A. Proceed with testing but note it in the final report
B. Re-seal the bag with proper evidence tape and initials
C. Document the deficiency and contact the submitting agency for clarification
D. Refuse the evidence and return it immediately without documentation
🟢 C. Document the deficiency and contact the submitting agency for clarification
🔴 RATIONALE: Maintaining the integrity of the chain of custody requires documenting any discrepancies or
improper seals upon receipt before any analysis occurs.
3. In a laboratory setting, what is the primary purpose of a "blank" or "negative control" sample?
,A. To calibrate the sensitivity of the instrument
B. To ensure that reagents and equipment are free from contamination
C. To provide a known reference for quantitative comparison
D. To speed up the processing time of the batch
🟢 B. To ensure that reagents and equipment are free from contamination
🔴 RATIONALE: Negative controls are essential in forensic science to prove that the results obtained are from the
evidence itself and not from background interference or laboratory error.
4. Under the Texas Code of Criminal Procedure, Article 39.14 (the Michael Morton Act), what is the primary
obligation of the state regarding evidence?
A. To keep all forensic methods confidential from the defense
B. To disclose all exculpatory or mitigating evidence to the defendant
C. To only provide evidence that will be used during the trial
D. To charge the defense for copies of all laboratory notes
🟢 B. To disclose all exculpatory or mitigating evidence to the defendant
🔴 RATIONALE: The Michael Morton Act created a broad discovery obligation requiring the state to disclose
evidence that is material to any matter in the case, particularly exculpatory information.
5. Which of the following is an example of a Class Characteristic in forensic evidence?
A. A unique nick on the blade of a screwdriver
B. A specific wear pattern on the outsole of a shoe
C. The caliber of a spent bullet casing
D. DNA profile from a bloodstain
, 🟢 C. The caliber of a spent bullet casing
🔴 RATIONALE: Class characteristics are properties of evidence that can be associated only with a group and
never with a single source, such as the caliber of ammunition.
6. When testifying as an expert witness, a forensic scientist is asked a question by the defense that they do
not know the answer to. What is the most ethical response?
A. Provide the most likely scientific explanation based on general knowledge
B. State that they do not know the answer or that it is outside their area of expertise
C. Attempt to deflect the question by discussing a related topic they do know
D. Request a recess to look up the answer on a mobile device
🟢 B. State that they do not know the answer or that it is outside their area of expertise
🔴 RATIONALE: Expert witnesses must remain within the bounds of their personal knowledge and professional
expertise to maintain scientific integrity and credibility.
7. Which of the following defines "Precision" in a laboratory measurement?
A. How close a measured value is to the true or accepted value
B. The ability of a method to detect the smallest amount of an analyte
C. The degree of agreement among repeated measurements under the same conditions
D. The range between the highest and lowest values in a data set
🟢 C. The degree of agreement among repeated measurements under the same conditions
🔴 RATIONALE: Precision refers to the reproducibility of results, whereas accuracy refers to how close those
results are to the actual target value.
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
*CORE DOMAINS*
*Chain of Custody and Evidence Handling*
*General Laboratory Safety and OSHA*
*Texas Code of Criminal Procedure*
*Ethics and Professional Responsibility*
*Quality Assurance and Control*
*Foundational Biology and Chemistry*
*Legal Testimony and Courtroom decorum*
*Instrumental Analysis*
*INTRODUCTION*
The purpose of the Texas Forensic Scientist I Examination is to assess the competency and foundational
knowledge of entry-level forensic professionals. This examination evaluates a candidate’s understanding of
rigorous scientific principles, state-specific legal requirements, and the ethical standards necessary for
maintaining the integrity of the criminal justice system. The assessment consists of multiple-choice and scenario-
based questions designed to mirror real-world laboratory challenges and courtroom demands. By focusing on
critical thinking and the application of technical skills, this exam ensures that practitioners possess the requisite
expertise to provide accurate, unbiased, and defensible scientific results for the citizens of Texas.
*SECTION ONE*
, 1. Which Texas legislative body is responsible for the oversight and accreditation of forensic laboratories
within the state?
A. Texas Department of Public Safety
B. Texas Forensic Science Commission
C. Office of the Attorney General
D. Texas Board of Professional Scientists
🟢 B. Texas Forensic Science Commission
🔴 RATIONALE: The Texas Forensic Science Commission (TFSC) is mandated by state law to oversee
laboratory accreditation and the licensing of forensic analysts in Texas.
2. A forensic scientist receives a sealed evidence bag with a torn corner that has been taped over without
initials. What is the first step the scientist should take?
A. Proceed with testing but note it in the final report
B. Re-seal the bag with proper evidence tape and initials
C. Document the deficiency and contact the submitting agency for clarification
D. Refuse the evidence and return it immediately without documentation
🟢 C. Document the deficiency and contact the submitting agency for clarification
🔴 RATIONALE: Maintaining the integrity of the chain of custody requires documenting any discrepancies or
improper seals upon receipt before any analysis occurs.
3. In a laboratory setting, what is the primary purpose of a "blank" or "negative control" sample?
,A. To calibrate the sensitivity of the instrument
B. To ensure that reagents and equipment are free from contamination
C. To provide a known reference for quantitative comparison
D. To speed up the processing time of the batch
🟢 B. To ensure that reagents and equipment are free from contamination
🔴 RATIONALE: Negative controls are essential in forensic science to prove that the results obtained are from the
evidence itself and not from background interference or laboratory error.
4. Under the Texas Code of Criminal Procedure, Article 39.14 (the Michael Morton Act), what is the primary
obligation of the state regarding evidence?
A. To keep all forensic methods confidential from the defense
B. To disclose all exculpatory or mitigating evidence to the defendant
C. To only provide evidence that will be used during the trial
D. To charge the defense for copies of all laboratory notes
🟢 B. To disclose all exculpatory or mitigating evidence to the defendant
🔴 RATIONALE: The Michael Morton Act created a broad discovery obligation requiring the state to disclose
evidence that is material to any matter in the case, particularly exculpatory information.
5. Which of the following is an example of a Class Characteristic in forensic evidence?
A. A unique nick on the blade of a screwdriver
B. A specific wear pattern on the outsole of a shoe
C. The caliber of a spent bullet casing
D. DNA profile from a bloodstain
, 🟢 C. The caliber of a spent bullet casing
🔴 RATIONALE: Class characteristics are properties of evidence that can be associated only with a group and
never with a single source, such as the caliber of ammunition.
6. When testifying as an expert witness, a forensic scientist is asked a question by the defense that they do
not know the answer to. What is the most ethical response?
A. Provide the most likely scientific explanation based on general knowledge
B. State that they do not know the answer or that it is outside their area of expertise
C. Attempt to deflect the question by discussing a related topic they do know
D. Request a recess to look up the answer on a mobile device
🟢 B. State that they do not know the answer or that it is outside their area of expertise
🔴 RATIONALE: Expert witnesses must remain within the bounds of their personal knowledge and professional
expertise to maintain scientific integrity and credibility.
7. Which of the following defines "Precision" in a laboratory measurement?
A. How close a measured value is to the true or accepted value
B. The ability of a method to detect the smallest amount of an analyte
C. The degree of agreement among repeated measurements under the same conditions
D. The range between the highest and lowest values in a data set
🟢 C. The degree of agreement among repeated measurements under the same conditions
🔴 RATIONALE: Precision refers to the reproducibility of results, whereas accuracy refers to how close those
results are to the actual target value.
