The 13-year-old girl was charged as a juvenile, prosecutors said, with the hopes that she could be rehabilitated.
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The 13-year-old used two different knives in the attack; first a butcher knife she grabbed from the kitchen, and when that "was not getting the job done," Digiacomo said, she went into the laundry room and grabbed her mother's self-defense knife, which was much bigger.
The teen stabbed her sister upward of 10 times, Digiacomo said, then called her step-father and 911. She did not give officers who responded to the scene any issues, allowing them to go inside where they found the 7-year-old girl unresponsive in the bathtub.