Nine Massachusetts teens were indicted Monday for driving a pretty 15-year-old "new girl" from Ireland to suicide in a case that has become a symbol of high school bullying.

The sweeping charges - which come after months of complaints that the bullies weren't being punished - include statutory rape, violation of civil rights with bodily injury, criminal harassment and stalking.

Phoebe Prince, a new arrival at South Hadley High School from a tiny seaside hamlet in County Clare, was mercilessly tormented by a cadre of classmates later dubbed the "Mean Girls" by Massachusetts newspapers.

"The investigation revealed relentless activity directed toward Phoebe designed to humiliate her and to make it impossible for her to remain at school," District Attorney Elizabeth Scheibel said.

"The bullying, for her, became intolerable."

Students said Phoebe was called "Irish slut" and "whore" on Twitter, Craigslist, Facebook and Formspring.

Her books were routinely knocked out of her hands, items were flung at her, her face was scribbled out of photographs on the school walls, and threatening text messages were sent to her cell phone.

Scheibel said she had drawn the ire of the "Mean Girls" by briefly dating a popular senior football player in her first freshman weeks at the school. One student later said it felt like the whole school ganged up on her.

On Jan. 14, Phoebe was harassed and threatened in the school library and in a hallway, Scheibel said. As she walked home, one of the "Mean Girls" drove by and threw a can of Red Bull at her.

Phoebe walked into her house and hung herself in a stairwell.

The nastiness didn't even end there. Her tormentors posted vicious comments on the dead girl's Facebook memorial page.

For months, community anger simmered that no punishment had befallen Phoebe's bullies. Petitions were signed and town hall meetings held.

Scheibel said her investigators were taking the time to investigate thoroughly, and she slammed "the inexplicable lack of cooperation from Internet service providers, in particular Facebook and Craigslist."

Seven of the nine teens indicted were girls charged with a range of crimes, from criminal harassment to stalking to civil rights violations. A juvenile girl was charged with assault by means of a dangerous weapon - the Red Bull can.

The two males, 17 and 18, were charged with statutory rape.

Unveiling the indictments, Scheibel said numerous faculty members, staff members and administrators at South Hadley High School were aware of the bullying - some even witnessed physical abuse - and did nothing.

She said the investigation looked at whether the adults' failure to help Phoebe amounted to criminal behavior.

"In our opinion, it did not," she said. "Nevertheless, the actions - or inactions - of some adults at the school are troublesome."

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