 The research which Forrest in particular did led to her appearing as an expert witness for the plaintiffs at the "Kitzmiller v. Dover Area School District" intelligent design trial, in which intelligent design was ruled to be religious creationism and not science, and thus could not be taught as science in public school classrooms of Dover, Pennsylvania because of the Establishment clause of the US Constitution.During the trial, pre-publication drafts of the textbook at the center of the controversy "Of Pandas and People" were uncovered which revealed its creationist origins and how it had changed from using creationist terminology to using intelligent design terminology as a result of the U.S. Supreme Court decision in "Edwards v. Aguillard".This formed an important part of Forrest's testimony.