special correspondent john larson reports from british columbia. >> my pain or discomfort is virtuallyant. >> reporter: when medically assisted death was argued before the canadian supreme court, elayne shapray's statement was exhibit a. >> i cannot move, or turn over in bed. in effect, i am a prisoner of my own body. i no longer consider my life worth living, unless i also possess the means to leave it at the time of my choosing. >> reporter: shapray was a nurse, an active mother of two, until multiple sclerosis struck. now 68 years old, she can no longer do much of anything without help, including, and this is why she's exhibit a take her own life. how far away are you from that point where you would no longer be able physically-- to end your own life? >> i can see it from here. >> reporter: the question of whether doctors should be allowed to help people like elaine die was at the center of the canadian supreme court decision. the court ruled: laws making physician assisted death illegal, violated canadians' constitutional rights in cases where an adult "clearly consents to the term