dr. eric walsh, the oregon physician who prescribed the medication. dr. walsh couldn't talk about the specifics of brittany's case the first time has agreed to discuss why he prescribed the medication to her, as well as to 19 others. >> dr. eric walsh: when somebody's facing the end of their life, shouldn't they be in control? shouldn't i be able to help them when they're suffering, and the burden of living becomes intolerable to them? >> lapook: we hear a lot about statistics about the oregon experience. but it's a lot of sort of statistical detail, and not a lot of emotion. >> walsh: you're right, the statistics are very dry. someone said that statistics are human stories with the tears washed off. >> lapook: tell me about your tears, perhaps once you're involved in this. >> walsh: you know, we categorize tears into a single adjective. tears of joy, tears of sorrow, tears of regret. but actually in the physician aid-in-dying, these are tears that contain all-- all of those adjectives. >> lapook: elizabeth wallner looks healthy, but has advanced surgeries