 Tom writes a letter to Captain Fulton Bishop, a detective involved in the case of Marita's murder.Victor Pasmore warns Tom to stay away from Lamont, though Tom does not and visits Lamont's house that same day, mailing the letter on the way there.Lamont and Tom both share a passion for solving murders without the aid of policemen, and Tom correctly deduces that Friedrich Hasselgard, Marita's brother, was, in fact, Marita's murderer.