I know because I found the body.

You were at the inquest, and testified.

I saw you with my own eyes.

The next day you discharged Sexton, and later he learned, and reported to me, that some one called you on the phone from Wray Street, and wanted you to come over there at once." "Was that why you went there ?" "Yes; I felt something was wrong; the killing of Percival Coolidge had aroused my suspicions; and I sought to learn who those people were you had visited in the cottage.

They were gone, and only for this telephone call, I should have lost the trail entirely.