Another way is to force men and women into hypnosis.

A usual way.
One instance, by injection of a narcotic in clinics, but mainly, by serving food and drink mixed with a soporific in a cave underground or a room at home or of a hotel, or making eat or drink them before entering.
If you feel sleepy, you can not sleep underground. A sleeping body is just a log for habitual murderers.
Your fake family or fake friend may call for you.