Police are investigating claims that a teenage girl allegedly bragged on Facebook how she bullied a 12-year-old who killed herself.
Guadalupe Shaw, 14, told her followers that she didn't give a f*** after the death of Rebecca Ann Sedwick and admitted that she had bullied the youngster, it's claimed.
In teen speak, Shaw allegedly wrote: "Yes IK [I know] I bullied REBECCA nd [sic] she killed her self but IDGAF [I don't give a f***]."
The disturbing message was revealed after two girls were arrested in connection with the death of Rebecca in Winter Haven, Florida. Shaw was one, and the other was Katelyn Roman, 12.
Polk County Sheriff Grady Judd said Rebecca was 'terrorised' by as many as 15 girls who ganged up on her and picked on her for months through online message boards and texts.
She jumped to her death from a tower at an abandoned concrete plant on September 10.
It is believed the bullying started when Shaw started dating Rebecca's ex-boyfriend.
Witnesses told investigators she sent messages to Rebecca, calling her ugly, telling her to 'drink bleach and die', and encouraging her to kill herself.
The 12-year-old was assaulted in school and repeatedly hounded in online messages or texts telling her to kill herself and that she was ugly.
Her computer searches revealed she had searched for ways to commit suicide and asked questions like, 'What is overweight for a 13-year-old girl' . One of her screensavers also showed Rebecca with her head resting on a railway track.
Sheriff Judd said they decided to arrest Shaw after she posted the Facebook message on Saturday.
"We decided that we can't leave her out there. Who else is she going to torment, who else is she going to harass?" he said.
Roman was Rebecca's former best friend, but Judd said the 14-year-old turned her against Rebecca. Other girls also stopped being friends with her in fear of being bullied, the sheriff said.
"Several students corroborated stories of both girls bullying Sedwick on different occasions, through name-calling, intimidation, threats to beat her up, and at least one actual physical fight," the sheriff said.
He warned parents: "Watch what your children do online. Pay attention to what your kids are doing. Quit being their best friend and be their best parent."
Roman and Shaw were arrested on Monday night and detained at the county's juvenile centre before being released to their parents. They were charged with felony aggravated stalking.
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