went upstairs to speak with his partner, detective sedlack. >> and it was sort of like a mental slip.d if i had a shot. i wanted a chance to talk to her myself. >> and so the detectives decided to play good cop, bad cop with morgan. >> i want to hear everything and you better start at the beginning because the game's over. >> and now morgan was about to offer a new piece to the puzzle, a truly shocking one. it had started as a joke, she said, the two lovers imagining kevin out of the picture. >> joking around how, you know, we could take kevin out. yeah, right. >> what would happen, they wondered, if they put something in his favorite drink. >> he put nicotine, straight nicotine in his snapple that he bought. >> following a recipe that he found online, steve cooked up some chewing tobacco into a toxic substance called liquid nicotine. he then slipped the poison into kevin's snapple. >> and then who handed the snapple to your husband? >> it was on the truck. i did. >> did you say anything to your husband like, that drink's for you. >> no, the rest of us don't drink it, so -- >> and the