Learn why polygraph results face admissibility challenges in court, the landmark rulings that shaped the law, and how state-by-state rules determine when lie detector…
Read Article →How Harvard psychologist William Moulton Marston invented the systolic blood pressure deception test in 1915 and created Wonder Woman — shaping polygraph history forever.
Read Article →Explore polygraph limitations including accuracy data, countermeasures, legal admissibility under Frye and Daubert, EPPA restrictions, and how modern technology addresses historic challenges.
Read Article →Comprehensive guide to polygraph admissibility in court covering state-by-state laws, Frye and Daubert standards, landmark cases, EPPA protections, and defense strategies.
Read Article →Explore how Commonwealth v. Shrawder (2007) defined constitutional limits on PCSOT polygraph testing in Pennsylvania sex offender supervision programs.
Read Article →Complete guide to Pennsylvania's polygraph admissibility standard under the Frye test, key cases like Pfender and Gee, and where polygraph testing remains essential in…
Read Article →Commonwealth v. Pfender (1980) established that polygraph results are inadmissible in PA courts even with a valid stipulation. Essential reading for PA legal professionals.
Read Article →State v. Grier (1983) established NC's per se ban on polygraph evidence in all trials. Learn the case history, court reasoning, and current NC…
Read Article →People v. Angelo (1996) is the key NY Court of Appeals ruling on polygraph admissibility, applying the Frye standard in the 'Angel of Death'…
Read Article →State v. Biddle (1980) is the Missouri Supreme Court ruling that banned all polygraph evidence from criminal trials, even by stipulation. Learn the full…
Read Article →State v. Litzau (1985) established Minnesota's absolute per se exclusion of polygraph evidence — barring results even when both parties agree to admissibility.
Read Article →State v. Catanese (1979) established Louisiana's polygraph evidence policy, excluding results from criminal trials while recognizing the technique's high probative value.
Read Article →Complete guide to Florida police polygraph laws, court admissibility rules, sex offender testing mandates, EPPA protections, and qualified examiner qualifications.
Read Article →Comprehensive guide to Florida polygraph admissibility laws, from the 1952 Kaminski ruling to the 2019 Daubert adoption, including stipulation exceptions and PCSOT rules.
Read Article →Delaware AG M. Jane Brady joined 28 states in the landmark U.S. v. Scheffer Supreme Court case, shaping polygraph evidence admissibility law nationwide.
Read Article →State v. Porter (1997) adopted Daubert in Connecticut but upheld per se polygraph inadmissibility, shaping evidence law across the state for decades.
Read Article →People v. District Court (1990) clarified Colorado's polygraph rules: test results stay inadmissible, but pre-test statements to examiners may be used at trial.
Read Article →Understand how Colorado CRE 702 and 403 affect polygraph admissibility, from the People v. Anderson ruling to today's SOMB programs and pre-trial uses.
Read Article →People v. Anderson (1981) established Colorado's per se polygraph inadmissibility rule. Learn how polygraphs still play critical roles in investigations and supervision.
Read Article →Comprehensive state-by-state guide to polygraph admissibility in U.S. courts, covering Frye, Daubert, stipulation rules, and the latest 2025 case developments.
Read Article →Complete guide to California Evidence Code § 351.1 — polygraph admissibility rules, the stipulation exception, employment protections, and lawful uses.
Read Article →Complete guide to US state polygraph associations — covering licensing requirements, APA training standards, EPPA compliance, and membership benefits across all 50 states.
Read Article →Complete guide to polygraph admissibility in custody battles. Learn state-by-state rules, key court decisions, and how to use polygraph results effectively.
Read Article →State v. Valdez (1962) created the Valdez requirements — the leading framework for stipulated polygraph admissibility adopted by courts across America.
Read Article →Complete guide to New York polygraph laws covering licensing, employment restrictions, court admissibility, sex offender supervision, and how to find a qualified examiner.
Read Article →Complete guide for polygraph examiners testifying as expert witnesses — Daubert/Frye standards, qualification hearings, chart presentation, and cross-examination.
Read Article →How Clarence Darrow challenged early lie detection technology in Chicago and shaped a century of polygraph admissibility debates in American courts.
Read Article →EyeDetect is not broadly admissible in U.S. courts, but a 2018 New Mexico ruling granted a Daubert motion—learn the full legal landscape for attorneys.
Read Article →Compare Frye vs. Daubert standards for polygraph admissibility. Jurisdiction analysis, landmark cases, and attorney strategy for introducing lie detector evidence.
Read Article →Complete guide to the Daubert standard and how it governs polygraph admissibility in federal and state courts, with landmark case law and attorney strategies.
Read Article →Complete defense attorney guide to challenging polygraph evidence in court — Daubert/Frye motions, examiner attacks, expert witnesses, and constitutional arguments.
Read Article →How prosecutors use polygraph results in plea bargaining, sentencing, parole, and PCSOT — plus the landmark cases and legal standards governing admissibility.
Read Article →Legal guide on how polygraph results function as circumstantial evidence in court, covering Daubert, Frye, Rule 704(b), landmark cases, and attorney strategy.
Read Article →Explore 130+ years of polygraph history: from Lombroso's 1890s experiments to AI deception detection, covering every pioneer, landmark court case, and innovation.
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