The plot thickens.....

Now I´m really curious. At midnight the mysterious machine started up again. Hmmm. Then some angry conversation. Then bumping sounds. Footsteps. Silence. Saw-like sounds are heard. Somebody exits the apartment, walks down the stairs, throws something in the garbage chute. That somebody enters the apartment again. What is going on ???????? Well, at least the wife is still alive.... maybe they are luring unsuspecting victims into the apartment and killing them together ?? The exciting saga continues....