 When found by the police, the diary confirms Patricia's second story, insofar as Muriel did switch her affections from Andrew to her boss, but it also records a violent encounter between an evasive Muriel and an angry Andrew which formed the basis of Patricia's first story.After repeated lying, the girl admits that she was lethally jealous of the sexier Muriel, who she felt had stolen the love of her brother.After killing her horribly, she wounded herself to give credibility to her story.