>> oh, no, we're not done with her. >> for the moment, szalbirak left her at the hospital to be withamily. it was up to danielle to reveal the identity of the shooter and explain the sordid details of how she was connected to him. >> she said, "i need you to sit down, i have something to tell you," and the hairs on the back of my neck stood up. >> first, cindy learned sam and danielle were getting a divorce. then that both danielle and sam were having affairs. most shocking of all? it was danielle's lover who shot sam. >> did i just hear what i just heard? >> four adults ensnared by lies and deceit, one clinging to life, but this sang wills story was about to get a whole lot more twisted. >>> coming up -- >> danielle was just fully obsessed with what sam was doing, which went beyond anything that i've seen before in investigations. >> when "dateline" continues. this is charlie not coughing because he took delsym 12-hour. and this is charlie still not coughing while trying his hardest not to wake zeus. delsym 12-hour. nothing lasts longer for powerful cough relief. my skin gets so tir