A U.S. Defense Department museum has unconstitutionally denied the Innocence Project access to archives containing information on bite mark analysis—a forensic science the organization calls tragically flawed and thoroughly discredited—the group has said in a new federal suit.

The process has led to “untold numbers” of convictions, yet the group says the museum has coordinated with the American Board of Forensic Odontology to deny it direct access, as well as through a Freedom of Information Act request, because of the group’s critical view of the process, according to the complaint filed in the U.S. District Court for the Southern District of New York.