BOSTON -- A teenage girl wanted in connection with a weekend stabbing has turned herself in to police.

Tiffany Rivera, 16, said she got into a fight after a party early Sunday morning and stabbed an 18-year-old girl in self-defense.

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The victim was slashed in the face and torso eight times, leaving her in critical condition.

Rivera said it was a fight "gone wrong" and she decided to turn herself in because it was a case of self-defense.

Police said Rivera was also sending threatening e-mails and text messages to the stabbing victim.

Rivera faces charges of assault and battery with a dangerous weapon