When Simon Brimmer does his radio broadcast about Monica Gray's former lovers, Ellery becomes agitated. His father knew about the men, but did not mention them to Ellery, as none of them could have been guilty. Ellery starts searching for a piece of paper, and exclaims, "Why didn't I really read those files?" The only files we've seen were six months worth of local robberies, and Ellery did, in fact, read them and discover the connecting factor in them. Robbery files would have had no information about Monica's lovers.