Riktor doesn't like the way the policeman comes straight into the house without knocking. He doesn't like the arrogant way he observes his home.The policeman doesn't tell him why he's there, and Riktor doesn't ask. Because he knows he's guilty of a terrible crime.
But it turns out that the policeman isn't looking for a missing person. He is accusing Riktor of something totally unexpected. Riktor doesn't have a clear conscience, but this is a crime he certainly didn't commit.