Transcript for California Co-Ed Murder Plot
this half hour with the case of a college student in california who was accused of trying to hire two of her buyoyfriends to murder two ex-boyfriends. Now they're talking to "gma" about it. And clayton sandell has the story. Reporter: Prosecutors say behind this smile is a scorned ex-girlfriend out for revenge. 21-year-old uc riverside student barbara wu is behind bars in a murder-for-hire plot. The alleged target who has not been identified testified in court friday that after he dumped wu via e-mail she began a quest for revenge. Allegedly sending threatening messages posting his personal information on a craig'slist sex ad and confronting him with a knife. She guarded the door with a knife. She tried to attack me with the knife and that's all I remember. Reporter: On the stand he said he had to punch wu in the face in self-defense. Wu is fighting six felony charges including solicitation to commit murder and stalking which her attorney calls baseless. They have yet to produce one threat of any kind that my client made. What you're going to see, though, is a spurned young person that was very much in love. Reporter: The defense says while wu may be a jilted lover her only crime was egging her ex's car along with her new boyfriend dennis lin and all of it was his idea. He got caught by the school for egging the ex-boyfriend's car and blamed everything on my client. Reporter: According to court documents when she allegedly asked lin to report murder for him he went to police who asked him to wear a we are and when they listened they heard wu plotting a violent death for her ex. She asked me to kidnap him, tie him up so she could break his legs with a bat to motorcycle him and then to somehow kill him and then dispose of the body. Reporter: For "good morning america," clayton sandell, abc news, denver.
This transcript has been automatically generated and may not be 100% accurate.