[Closer to surface tunnels]
Archaeological Investigations of the McMartin Preschool site by E. Gary Stickel, Ph.D. The McMartin Tunnel Project confirms that a functional pattern of tunnels once existed under the McMartin Preschool, that the tunnels provided access outside the walls of the structure, that they must have been constructed after the structure was built in 1966, and that they were subsequently completely repacked with extraneous soil and implanted artifacts at some time prior to May, 1990. While this project had no way of determining who dug these tunnels, or for what purpose, the discoveries stand in stark contrast to the skeptical position that the children only imagined what they described as activities underground. If the stories of the children were bogus fantasies, there is no excuse for the tunnels discovered under the school. If there really were tunnels, there is no excuse for the glib dismissal of any and all of the complaints of the children and their parents.