Instead of boarding the school bus as usual September 10, Rebecca Sedwick changed the name on her cell phone to "That Dead Girl" and sent a text to a friend.
"I'm jumping and I can't take it anymore," the 12-year-old wrote, then proceeded to climb a tower at an abandoned cement plant and leap to her death.
Police believe Rebecca had been bullied for more than a year, and two girls, ages 12 and 14, have been charged with aggravated stalking as a result.
Deputies arrested the girls and released them to their parents' custody.
The 14-year-old girl, whose name is being withheld, allegedly began taunting Rebecca Sedwck in the halls of Crystal Lake Middle School in Lakeland, Fla.
The 14-year-old also started dating Rebecca's former boyfriend.
Rebecca was reportedly "terrorized" by as many as 15 girls on social media, receiving messages like "you should die" and "why don't you go kill yourself?"
According to police, the 14-year-old and the 12-year-old, whose name is also being withheld, stepped up the bullying. The Sherriff's Office reports:
"Several students corroborated stories of both girls bullying Sedwick ... through name-calling, intimidation, threats to beat her up, and at least one physical fight."
Rebecca switched schools, but the bullying continued online.
After Rebecca killed herself, one of the girls posted on Facebook, "yes, I believed Rebecca and she killed herself I don't give a [expletive]," police say.
"Words are hurtful," Polk County Sheriff Grady Judd said. "They are as hurtful - and sometimes more hurtful - than sticks and stones. Ask Rebecca's family."