>> ashlee keetch: when i was 19, i started on oxycontin. ched over to heroin because you couldn't get the other anymore. >> stahl: ashlee was a hard-core drug addict for ten years. after many failed attempts to get clean, her parents told her they couldn't take it any more, and she ended up homeless in the slums of rio grande. this is where ashlee was. >> rezac: yeah. ashlee was down here, for a year. >> stahl: and you used-- you used to see her here. >> rezac: yeah, we used to try to put her in motel rooms for the night, when i could. >> stahl: what shape was she in when you saw her? >> rezac: well, you saw her today. imagine her 50 pounds lighter. >> stahl: 50 pounds lighter? >> rezac: yeah. with sores and-- she was not in good shape. >> stahl: she was barely recognizable. her grandmother often went looking for her, with food and offers of a comfortable place to sleep. >> kitsy keetch: she was skin and bones. and she told me that-- how hard it was to be on heroin, and how awful it was, and to be addicted to it. for the last ten years, espe