WINTER HAVEN, Fla. - A central Florida man says allegations that his 14-year-old daughter bullied a 12-year-old girl who killed herself are not true.
Polk County Sheriff Grady Judd said Tuesday authorities arrested the 14-year-old girl after she admitted online over the weekend that she had harassed Rebecca Sedwick.
"Yes ik I bullied REBECCA nd she killed her self but IDGAF," the post read.
Rebecca climbed a tower at an abandoned concrete plant Sept. 9 and jumped to her death.
A man who answered the phone at the 14-year-old suspect's Lakeland home identified himself as her father. He told The Associated Press that his daughter was "a good girl" and he was "100 percent sure that whatever they're saying about my daughter is not true."
Judd said he was concerned the 14-year-old girl would continue to bully others.
"We decided that we can't leave her out there. Who else is she going to torment, who else is she going to harass?" Judd said.
A 12-year-old girl was also arrested in the case. A message left at her Lakeland home was not immediately returned.
Both girls have been charged with felony aggravated stalking. The Denver Channel generally doesn't identify juveniles charged with crimes.
Judd said the bullying began after the 14-year-old girl started dating a boy that Rebecca had been seeing.
She "didn't like that and began to harass and ultimately torment Rebecca," Judd said.
The 12-year-old girl was Rebecca's former best friend, but Judd said the 14-year-old girl turned her against Rebecca. Other girls also stopped being friends with her in fear of being bullied, the sheriff said.
Authorities have said Rebecca was "terrorized" by as many as 15 girls who ganged up on her and picked on her for months through online message boards and texts.
Witnesses told investigators the 14-year-old girl told Rebecca "to drink bleach and die" and said she should kill herself.
Judd said neither girl's parents wanted to bring their daughters to the sheriff's office, so detectives went to their homes and arrested them.
Judd said the 14-year-old was "very cold, had no emotion at all upon her arrest."
The sheriff issued a stern warning to parents Tuesday.
"Watch what your children do online," Judd said. "Quit being their best friend and be their best parent."
"If you don't discipline your children, and if it rises to the level of a violation of law, don't worry, we'll discipline them for you."