Reason to Blow Up the World: The article isn’t too forthcoming with motive details but since prosecutors are wanting to try her as an adult we can possibly rule out self-defense. Anyway for the fact that this 16-year-old girl, Esmie Tseng, would stab her own mother, Shu Yi Zhang, repeatedly. If tried as an adult she could be sentenced to life. The article says that she had a website (probably myspace or something like that).
Tip to VonMexican.