The balance of truth: Should we still be using polygraph exams in law enforcement pre-employment screening?

Polygraph by is licensed under Canva
Written by: Joseph R. Auriemma, Jr. New York State Police Senior Investigator (Retired)

Polygraph exams, or lie detector tests, are key components of the pre-employment screening process for many law enforcement agencies. These tests measure physiological reactions to questions, aiming to gauge the examinee's truthfulness.

In the high-stakes environment of law enforcement, it is vital to ensure that candidates possess the necessary skills and uphold the integrity and ethical standards required for the job. Thus, polygraphs have become integral tools for vetting potential applicants.

The role of polygraph examinations was initially in criminal investigations, but their use eventually extended to the pre-employment screening processes of various agencies, including the FBI, CIA, and many police departments. This expansion was due to the belief that individuals who are truthful about their past actions and behaviors are more likely to exhibit the integrity required for law enforcement duties.

Despite their widespread use, polygraphs have been the subject of debate, primarily due to questions about their accuracy and the ethics of their application. However, within the context of pre-employment screening for law enforcement, they are not used alone but as part of a comprehensive evaluation process that includes background checks, psychological testing, and interviews.

This multifaceted approach helps mitigate criticisms, ensuring that no single tool bears the burden of assessing a candidate's suitability for law enforcement work. A primary benefit of polygraph exams is their role in verifying the integrity of potential law enforcement candidates. By asking direct questions about past behaviors, criminal activities, drug use, and other relevant issues, agencies can gain insights into the character and honesty of applicants.

This process helps ensure that only those who meet the high ethical standards required for law enforcement duties are considered for positions. The presence of a polygraph exam in the hiring process deters individuals with disqualifying backgrounds. Knowing that they will be subjected to a lie detector test, candidates who might have otherwise hidden aspects of their past are either discouraged from applying or are more likely to be truthful during the screening process.

This deterrent effect streamlines the selection process by reducing the number of unsuitable applicants. Additionally, polygraph exams can provide valuable insights into an applicant's psychological suitability for a career in law enforcement.

The stress responses elicited during a polygraph test can indicate how an individual might handle high-pressure situations, a critical trait for law enforcement officers. While not a substitute for comprehensive psychological evaluations, polygraph results can complement other assessments to provide a more nuanced understanding of a candidate's capabilities.

Empirical data supports the benefits of polygraph exams in law enforcement pre-employment screening. Studies have shown that polygraph testing can significantly enhance the vetting process by identifying candidates who may pose a risk to the integrity and efficacy of law enforcement agencies.

For instance, a study by the American Polygraph Association found that polygraph testing, when used in conjunction with other screening methods, can improve the accuracy of preemployment screenings by up to 60%. While polygraph exams offer significant benefits in screening, they are not without their challenges and ethical considerations.

Critics argue about their reliability and the potential for false positives or negatives, where truthful individuals may be wrongly identified as deceptive and vice versa. The accuracy of polygraph tests has been a point of contention, with critics citing studies questioning their validity and reliability.

Law enforcement agencies often use polygraph results as one component of a comprehensive evaluation process rather than the sole determinant of a candidate's suitability to mitigate concerns about accuracy. This multifaceted approach ensures that decisions are not based solely on the outcome of the polygraph exam but are corroborated by other assessments and background checks.

The ethical use of polygraph testing in pre-employment screening involves ensuring that examinations are conducted professionally, respectfully, and by established legal and ethical standards. This includes obtaining informed consent from applicants, maintaining confidentiality, and providing an opportunity for individuals to clarify or contest results that may be indicative of deception.

Recognizing the limitations and criticisms of polygraph testing, many law enforcement agencies and professional organizations advocate for ongoing research, training, and technological advancements to enhance the reliability and ethical application of polygraph exams.

Additionally, oversight by professional bodies and adherence to standardized protocols help ensure that polygraph testing remains a fair and effective tool in pre-employment screening. Polygraph exams have become indispensable in law enforcement pre-employment screening, epitomizing our commitment to the highest ethical and professional standards.

By meticulously assessing candidate integrity and deterring those who do not meet our stringent criteria, polygraph tests serve as a testament to our dedication to the community's welfare. This rigorous screening process is not just about maintaining internal standards; it's a clear signal to our community that we are unwavering in our mission to recruit only the most honorable and suitable individuals to protect and serve them.

The thoughtful integration of polygraph testing, backed by ongoing research and practical achievements, ensures that our law enforcement agencies are synonymous with excellence and trustworthiness. As we continue to refine and ethically apply this technology, we reinforce the bridge of trust between us and the community, affirming our resolve to ensure a safe and just society with the finest individuals at the helm of public safety.


About the Author: Joseph R. Auriemma, Jr., serves as the Managing Owner of Advanced Strategic Communications, LLC, a premier consulting and training firm that has redefined standards in communication training. Boasting an impressive background with more than two decades in law enforcement, he brings unparalleled expertise to the realm of communication training. For a comprehensive insight into Joseph R. Auriemma, Jr.'s methodologies and the innovative approaches employed by Advanced Strategic Communications, LLC, please visit our website at
For corrections or revisions, click here.
The opinions reflected in this article are not necessarily the opinions of LET
Sign in to comment


Powered by LET CMS™ Comments

Get latest news delivered daily!

We will send you breaking news right to your inbox

© 2024 Law Enforcement Today, Privacy Policy