BALTIMORE (AP) — A presidential historian's assistant charged with conspiring to steal valuable documents from archives throughout the Northeast has entered a plea of not guilty.

Twenty-four-year-old Jason Savedoff entered the pleas Friday morning in U.S. District Court in Baltimore.

Savedoff and historian Barry Landau are charged with stealing historical documents from the Maryland Historical Society and conspiring to steal documents from other archives. Savedoff was released on bail last month, but had not yet entered a plea. Landau pleaded not guilty and was released....