A mum has been arrested after a Facebook video showed a woman violently attacked a teenage girl in a high school courtyard.
Mary Alice Hernandez, 34, was arrested for assault causing bodily injury after the clip was posted online by the victim's mother.
Julie Pinon claims her teenage child was attacked after she had got into a fight with the woman's daughter.
The footage shows a woman striking the girl across the head and yanking her hair.
A man watching the fight repeatedly tells the woman 'let's go, let's go' as she attacks the girl at Miller High School in Corpus Christi in Texas.