A 12-year-old Florida girl leaps off a tower to her death. Two of her classmates are arrested, accused of a modern rite of middle school: sending cruel, harassing texts.

Katelyn, now 13, stands outside the chain-link fence at the cement plant where Rebecca jumped to her death. It’s a cloudy January afternoon, some four months after the tragedy, and Katelyn is here with two good friends and her mother. The girls stand together in a silent row, gazing up at the pair of silos, several stories high. It’s a lonely scene, a forgotten lot in a rundown area on the fringe of town. Weathered tributes to Rebecca line the fence — purple plastic poinsettias, a lineup of teddy bears, a Snoopy card. A handwritten note reads, “You were amazing.”