Karma: Interfering with Karma

                                                                  Q. If a person is suffering for a long time, 'mercy killing' of that person is practiced in America. Won't that affect the spiritual life of the person being killed? How will it affect? Will the doctors also incur sin by this? Please clarify.

                                                                  For clarification sake, I am assuming that your use of the term 'mercy killing' is restricted to the category of medically assisted suicide.