French comes in for criticism on his own for his poor sourcing. In an Asia Times interview, the authors note, he implied he had relied on the police and autopsy reports from the case but never cited them in his own footnotes for the book. They question whether French really saw them, since archivists at the Rockefeller Archive Center, which keeps all of PUMC's prewar records since the school was established with that family's money, have found no report from an autopsy performed later than 1933. Most of French's reconstructed account of the investigation comes entirely from Werner's letters. Likewise, any police records from that era did not survive the war years.
