remember sarah dutra? secretary, elisa's friend, who came in with her little dogs and was so helpful to the detectives after larry and elisa disappeared? now elisa was saying killing larry was sarah's idea. >> i never would have thought that upon my own. >> elisa told the story this way. larry was a heavy drinker and drug user. he was abusive, she claimed, and she feared for her life. one day, she said, she confided in her young friend sarah. sarah said there was just one thing to do, kill larry mcnabney. now, in this three hour long interview, elisa went into detail after gruesome detail of how she and sarah did it. elisa and larry were at a horse show in los angeles, she said, and sarah flew down to meet them. or rather to meet elisa, since larry didn't like sarah, said elisa. >> and what did you guys decide to do with him? >> we said if we kill him, nobody's gonna miss him. >> were you going to do it that day? or were you going to do it sometime in the future? when were you guys planning on doing it? >>