Mervilus v. Union County, No. 21-3185 (3d Cir. 2023)
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In 2006, Mervilus, age 22, supported his mother, a cancer patient, and two younger siblings. Abreu accused Mervilus of robbing and stabbing him. Mervilus agreed to take a polygraph examination. Earlier that year, officers dismissed drug charges after a polygraph exam indicated he truthfully denied responsibility. New Jersey permitted polygraph results to be admitted at trial. The Union County Police Department’s only certified polygraph examiner, Kaminskas, conducted the exam. Kaminskas used the “Arther Method,” an “outlier in the polygraph world,” not accredited by the American Polygraph Association. The Method relies on subjective observations and assumptions, such as that certain ethnic groups do not experience any guilt when they lie. Kaminskas concluded Mervilus was deceptive. The only relevant question where Mervilus’s physiological responses signaled deception was a question for which Kaminskas insisted Mervilus change his answer. At trial Abreu failed to identify Mervilus, pointing to a different Black man. The court admitted the polygraph exam. Mervilus was convicted. In 2011, the conviction was overturned on the ground that Kaminskas’s testimony was improper and prejudicial.
Mervilus sued Kaminskas, Chief Vaniska, and Union County, 42 U.S.C. 1983. The Third Circuit reversed the summary judgment rejection of those claims. Mervilus introduced sufficient evidence to try his fabrication-of-evidence claim against Kaminskas. His Monell claim against Union County is viable even if Kaminskas did not fabricate evidence; a jury might not render an inconsistent verdict if it found the County liable but Kaminskas not culpable.
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