The 6th Circuit Court of Appeals has ruled that functional magnetic resonance imaging cannot be used in a criminal case to prove that the defendant’s denials of wrongdoing were true.
Defendant wanted to introduce evidence of the fMRI to prove that he was telling the truth in his criminal trial and that did not intentionally violate the law. In an issue of first impression, the court of appeals affirmed the exclusion of the evidence. The court said
that the district court did not abuse its discretion in excluding the fMRI evidence pursuant to Rule 403 in light of (1) the questions surrounding the reliability of fMRI lie detection tests in general and as performed on [defendant] Dr. Semrau, (2) the failure to give the prosecution an opportunity to participate in the testing, and (3) the test result’s inability to corroborate Dr. Semrau’s answers as to the particular offenses for which he was charged.