Public Employees for Environmental Responsibility -- "a national non-profit alliance of local, state and federal scientists, law enforcement officers, land managers and other professionals dedicated to upholding environmental laws and values" -- is charging the National Park Service with stalling on a promised review of a creationist book sold at the bookstores at Grand Canyon National Park.

After Selman v. Cobb County, the case that challenged the constitutionality of a textbook warning sticker that described evolution as "a theory, not a fact," was remanded to the trial court, the legal team for the plaintiffs recruited three expert witnesses for the possible retrial: McGill University's Brian Alters and Brown University's Kenneth R. Miller, both of whom served as expert witnesses in Kitzmiller v. Dover, as well as NCSE's executive director Eugenie C. Scott. The case was settled, so there will be no need for their testimony.