Found erica's joan who we now know is amanda north. we arranged her to meet erica in baltimore where she is in rehab. what did she think when her mom told her the good news? >> she said do you want to meet joan tomorrow? and i started crying. >> reporter: within 24 hours the two were set to meet. >> i really want to thank her for helping me and for being there and holding my hand the whole time. >> reporter: are you a little nervous as we head inside? >> yes, i really am. in a way she is a stranger to me, but when you share something like this, you feel like you've known someone your entire li...