Was Rebecca Sedwick bullied to death by classmates?

Two jueveniles have been arrested and charged with bullying Rebecca Sedwick. Twelve year old Sedwick killed herself after she was excessivley bullied. Her parents had removed her from the school and she was also in therapy, but through social media she was still bullied. Two girls have been arrested, but should they have been arrested? Even if the bullying is proven how do you connect their actions to Sedwick’s suicide? Was Sedwick’s death forseeable? Share your thoughts.
http://www.cnn.com/2013/10/15/justice/rebecca-sedwick-bullying-death-arrests/