Colorado Vs Bloom and the Use of Polygraph Evidence in Court
- Scott Stone
- 3 days ago
- 4 min read
The Colorado Supreme Court’s decision in Colorado v. Bloom clarified a critical issue in legal proceedings: polygraph test results cannot be presented to a jury. This ruling reflects the court’s concern about the potential influence polygraph evidence might have on jurors. While judges and attorneys may review polygraph results during case preparation, the jury must not hear or see these findings. Understanding the reasoning behind this decision is essential for legal professionals who rely on truth verification tools in their work.
This article explores the court’s reasoning in Colorado v. Bloom, explains why polygraph evidence is excluded from jury consideration, and compares polygraph testing with other truth verification methods available in Colorado Springs, such as EyeDetect and VAST. The goal is to provide a clear, professional overview of how these tools fit into legal practice and why their use in courtrooms is carefully regulated.
Why Polygraph Evidence Is Excluded from Jury Consideration
The Colorado v. Bloom case addressed whether polygraph results could be admitted as evidence before a jury. The court ruled that polygraph evidence should not be shown to jurors because it could unfairly influence their decision-making.
Polygraph tests measure physiological responses like heart rate, blood pressure, and skin conductivity to detect deception. However, these measurements are indirect indicators and can be affected by many factors unrelated to truthfulness. The court recognized that jurors might give undue weight to polygraph results, assuming they are infallible, which is not the case.
The ruling allows judges and attorneys to review polygraph results during case preparation. This helps legal teams assess credibility and strategy without exposing the jury to potentially misleading information. The court’s main concern is protecting the jury’s impartiality and ensuring verdicts are based on admissible, reliable evidence.

Courtrooms must protect jurors from evidence that could bias their judgment.
The Court’s Reasoning in Detail
The court’s decision in Colorado v. Bloom rests on several key points:
Potential for Jury Bias: Jurors may view polygraph results as scientific proof, even though the tests are not 100% accurate. This could lead to unfair prejudice.
Lack of Scientific Consensus: Polygraph testing is not universally accepted as reliable evidence in the scientific community. Courts must be cautious about admitting evidence that lacks broad validation.
Preserving Fair Trial Rights: The justice system prioritizes fair trials. Allowing polygraph evidence before juries risks undermining this principle by introducing confusing or misleading information.
Role of Judges and Attorneys: Judges and attorneys can use polygraph results to guide case strategy, witness credibility assessments, and plea negotiations. This internal use does not affect the jury’s impartiality.
This approach balances the usefulness of polygraph testing in investigations with the need to maintain fairness in court proceedings.
Comparing Polygraph, EyeDetect, and VAST in Colorado Springs
Truth verification technology has evolved beyond traditional polygraph testing. In Colorado Springs, professionals have access to several options, each with unique features and applications.
Polygraph Testing
Polygraph remains the most recognized method for detecting deception. It measures physiological responses during questioning. Polygraph exams are widely used in criminal investigations, pre-employment screening, and therapy settings.
Strengths: Long history of use, accepted by many agencies for internal investigations.
Limitations: Requires skilled examiners, results can be influenced by anxiety or medical conditions, not admissible before juries.
EyeDetect
EyeDetect is a newer technology that measures eye behavior, such as pupil dilation and eye movement, to detect deception. It is less invasive and faster than polygraph tests.
Strengths: Non-invasive, quick testing process, useful for screening and investigations.
Limitations: Still gaining acceptance, not a replacement for polygraph in all cases.
VAST (Voice Analysis Screening Technology)
VAST analyzes voice patterns to identify stress and deception. It can be used remotely and is often applied in pre-employment screening and internal investigations.
Strengths: Remote testing capability, useful for initial screenings.
Limitations: Less established than polygraph, influenced by environmental factors.

Polygraph machines remain a key tool for truth verification despite courtroom limitations.
Practical Implications for Legal Professionals
Legal teams in Colorado must understand the limitations and proper use of polygraph and other truth verification tools. The Colorado v. Bloom ruling means:
Polygraph results cannot be introduced as evidence before juries.
Attorneys can use polygraph findings to evaluate witness credibility and negotiate cases.
Alternative technologies like EyeDetect and VAST offer additional options for investigations and screenings.
Truth verification tools support case preparation but do not replace traditional evidence.
For example, a criminal defense attorney might use polygraph results to challenge a witness’s statements during pre-trial discussions. Meanwhile, a family law attorney could recommend EyeDetect testing to clarify disputed facts in custody cases. Employers conducting background checks might use VAST for initial screenings before moving to more comprehensive polygraph exams.
How Cross Point Solutions Supports Truth Verification in Colorado Springs
Cross Point Solutions LLC offers professional polygraph and truth verification services tailored to legal and investigative needs. Their expertise is recognized by the Colorado Public Defender’s Office and other agencies.
Services include:
Polygraph Testing: Conducted by certified examiners for criminal, civil, and personal cases.
EyeDetect Testing: A fast, non-invasive option for screening and investigations.
VAST Voice Analysis: Remote voice stress analysis for pre-employment and internal reviews.
These services help legal professionals gather reliable information while respecting courtroom rules about evidence admissibility.
Learn more about their offerings at Cross Point Solutions.

Certified examiners ensure accurate and ethical truth verification.
Summary
The Colorado v. Bloom decision highlights the careful balance courts maintain between using truth verification tools and protecting jury impartiality. Polygraph results are valuable for judges and attorneys but must be kept from juries to avoid undue influence.
Legal professionals in Colorado Springs have access to multiple truth verification methods, including polygraph, EyeDetect, and VAST. Each offers unique benefits and limitations. Understanding these tools and the legal framework around them helps attorneys and investigators use them effectively and ethically.
By integrating these technologies thoughtfully, legal teams can enhance case preparation and decision-making without compromising fairness in the courtroom.
For more information on professional truth verification services, visit Cross Point Solutions.
Disclaimer: This article provides general information about legal and truth verification topics. It is not legal advice. Consult a qualified attorney for specific case guidance.




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