. >> suzanne cogar was very, very important because suzanne cogar gave the best comprehensive understandingof the way nanette manipulated naposki into committing the murder. >> reporter: suzanne told them how she and eric would chat by the pool. how one day in the fall of 1994, eric was angry that his girlfriend's boss, meaning bill mclaughlin, had tried to rape her. >> totally untrue. they're engaged to be married. she had been living at the house as boyfriend/girlfriend for over three years. but naposki didn't know about it apparently. >> and he's in a rage about it. >> he's in a rage about it. >> reporter: after the murder, said suzanne eric sought her out, said if the police came around, tell them i'm a nice guy. >> she said, oh, my god, eric, i don't want to know if you had anything to do with this. he smiled and said, maybe i did, maybe i didn't. if you're accused of a murder you didn't commit, how are those words ever going to come out of your mouth? >> reporter: incriminating but hardly one of those tangible facts that gets someone sent away for life. >> this is one where every litt