Two Pasco county teenagers, filmed beating up a classmate on a school bus, have pleaded not guilty to battery charges.
The victim, Chase Cristia, was diagnosed with post traumatic stress disorder after the beating. The video shows two attackers punch, kick and yell profanities at her.
Her family says the bullying started earlier in the day at school.
The girls charged with beating Crista have been expelled from school. Crista's father tells us he wants them to face the harshest punishment possible.
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