You isolated him.

Yes, you suspected him." "Let us take the case from the beginning.

When you first came to me, as I told you, the Commissaire had already been with me.

There was an interesting piece of evidence already in his possession.

Adolphe Ruel--who saw Wethermill and Vauquier together close by the Casino and overheard that cry of Wethermill's, 'It is true: I must have money!'-- had already been with his story to the Commissaire.