The plot is evolving and the doors are closing in, we have a situation in which all of his crimes are being discovered.
The identity of the bodies and the correlation with the police reports that Dexter took out of the archives might be a clue as to his interest in their demise.
The fact that the black policeman who keeps tailing him knows that he is "connected" can't make life easier.
Will Dexter disappear or go to jail? Is there sufficient lack of evidence to keep him free?