Niagara Gazette — Mayer said the search for the diary dates to 1996, when two of Kempner's former legal secretaries approached a Holocaust museum official about Kempner's collection of papers.
Over the next several years, museum officials assessed and took possession of several documents from Kempner's collection, although some material they initially viewed in 1997 at Kempner's Pennsylvania home were missing when they went to retrieve the papers.
Mayer said officials later learned that the two secretaries and "another gentleman from upstate New York" had taken the papers.
Officials later found the materials at a home in Lewiston with the help of a private investigator and former FBI agent.
Acting upon a warrant issued by a federal magistrate judge in Delaware, authorities seized the diary in April. Authorities repeatedly refused to say who had the diary.
"After a bit of negotiation, shall we say, we were allowed to remove this material," Mayer said. He offered no other details.