[6] Inspector Queen’s statement here is not altogether true. Benjamin Morgan was far from “innocent.” But the Inspector’s sense of justice compelled him to shield the lawyer and keep his word regarding silence.—E. Q. Both men nodded wordlessly. The Inspector continued: “I needn’t explain that most investigations of crime begin with a search for the motive. Many times you can discard suspect after suspect when you know the reason behind the crime. In this case the motive was obscure for a long time. There were certain indications, like Benjamin Morgan’s story, but these were inconclusive. Morgan had been blackmailed by Field for years—a part of Field’s activities of which you gentlemen were ignorant, despite your knowledge of his other social habits. This seemed to point to blackmail as a possible motive—or rather the choking off of blackmail. But then any number of things could have been the motive—revenge, for example, by some criminal whom Field had been instrumental in ‘sending up.’ Or by a member of his criminal organization. Field had a host of enemies, and undoubtedly a host of friends who were friends only because Field held the whip-hand. Any one of scores of people—men and women both—might have had a _motive_ for killing the lawyer. So that, since we had so many other pressing and immediate things to think about and do that night at the Roman Theatre, we did not bother much with motive. It was always in the background, waiting to be called into service. “But mark this point. If it was blackmail—as Ellery and I eventually decided, since it seemed the most likely possibility—there were most certainly some papers floating about in Field’s possession which would be enlightening, to say the least. We knew that Morgan’s papers existed. Cronin insisted that the papers for which _he_ was looking were about somewhere. So we had to keep our eyes constantly on the alert for papers—tangible evidence which might or might not make clear the essential circumstances behind the crime.