Is a Scheduled Polygraph Examination Admissible As Evidence ?
In People v. Jefferson, 184 Ill. 2d 486, 492, 705 N.E.2d 56, 235 Ill. Dec. 443 (1998), the supreme court held that evidence of a scheduled polygraph examination was admissible. Jefferson, 184 Ill. 2d at 496.
The defendant in Jefferson testified at trial that she signed an inculpatory statement because the officer told her that if she signed the statement, she could go home.
While cross-examining the defendant, the State sought to present evidence regarding the defendant's agreement to take a polygraph test and her subsequent decision to confess prior to taking the scheduled polygraph.
The trial court allowed the introduction of the evidence over defense counsel's objection.
The supreme court held that the scheduled polygraph test was offered for the proper limited purpose of explaining the circumstances surrounding the defendant's confession after the defendant claimed at trial that her confession was induced by promises of lenient treatment. Jefferson, 184 Ill. 2d at 495-96.