[JURIST] The National Archives [official website] began an investigation Wednesday into the disappearance of a file containing papers authored by US Supreme Court nominee John Roberts [JURIST news archive] on affirmative action. Officials said the file disappeared [Washington Post report] from the Ronald Reagan Presidential Library in Simi Valley, California after two lawyers from the White House and Justice Department reviewed and returned it in July. An official in charge of the presidential libraries said that the file was simply misplaced and has been reconstructed [Scripps Howard report] as best as possible; another official said the disappearance was the archive agency's fault [UPI report]. The National Archives has also announced that more Roberts documentation will be made public [press release] Thursday. The New York Times has more.