Erin Cox went to a friend's aid when that friend asked her to be the designated driver. The friend had been drinking at a party and wanted to leave.
Erin's mother says police showed up a few minutes after her daughter arrived at the party. The school found out about the party and determined Erin was in violation of its zero-tolerance policy against drugs and alcohol.
"If a kid asks for help from a friend, you don't want that kid to say I'm sorry I can't help you I might end up in trouble at school," said Wendy Murphy, the family's attorney.
"She did what she thought was right and I'm very proud of herfor that," said Eleanor Cox, the girl's mother.
At court, an officer testified Erin was sober at the party and should not be punished.
The school declined to comment.
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