Evidence Commons^™

Witnesses - Effect Of Mental Deficiency On Competency And Credibility, Erwin B. Ellmann

Michigan Law Review

Inquiry into the admissibility of evidence showing mental deficiency in a witness is suggested by State v. Teager, a recent decision of the Supreme Court of Iowa. Defendant, charged with assault with intent to commit rape, offered to prove by a school teacher that the complaining witness, a child twelve years old, was "at least two years behind in her school work . . . subnormal mentally . . . and ought to be in an institution . . . . " No objection had been made to the competency of such witness. It was held that the evidence …